(plz read in need of help) stuck between everybody

Truth is I'm stuck like I've never been before. I'm mu5ic. There are two girls ( "L" and "S" ). Me and L grew up together were in band together and always competed against each other in the 5th and 6th grade then I moved away. After a tragedy I moved back to that city in 2009. Where we once again met each other at our teenage years. We caught up with eachother and eventually became close friends again. She constantly would tell me how her then boyfriend would mistreat her, hang up on her, not call her for days, etc. etc. So after awhile I confessed my love for her and we became a couple. Few weeks later she broke up with me and returned to her ex because she said she still loved him. (Girls always love the bad boy type until they've got enough of putting their hand in the fire and being burned) so after a month she returned to me and of course I took her back because the love I felt for her was like nothing I ever felt before and I knew what love was from seeing my families marriages and relationships. Then after a altercation with her ex she broke up with me once again and returned to him. This time I searched for evidence that he was cheating and other things. ( Some might consider this hating or being a snitch but if it was somebody you loved dearly you'd do the same ) after a few days of collecting evidence I found out he had cheated on her the whole year they had been together and that he had a 3 month old child that she knew nothing of. So i guess she was just the sideline to vent his anger out on. So the very night before her birthday she calls me crying and of course no matter how she did me I welcomed her back with open arms and couldn't turn her away. We lasted for a few months that time. Until this guy who was supposedly her friend kept hugging her and grinning in my face she kept reassuring he was just a friend but I didn't like it I asked her to stop letting him hug her because he doesn't act as a friend and she told me no and broke up with me saying I was insecure and selfish. This time she got with this other guy named "K" and I knew K was another bad guy type. Had a class with him and he came in saying who he was in a relationship with and that he only wanted one thing I resisted from k.o.ing him in the classroom. It took all I had I guess he was unaware that she was my ex. So he finally got what he wanted by convincing her to skip school with him. She was a virgin and promised I would be the one to take it because I didn't want any other guy to not for the benefit to say I did but because I didn't trust any guy with her body. And that's exactly why I wanted it to be, because after we graduated 4 months later she texts me and tells me she's pregnant. I was lost for words because it felt as if my whole world had ended to have the love of my life carrying the seed of another. But of course having the feelings for her and the things we had been through i told her that no matter what I would love her and always be there for her if she needed me. She cried because she couldn't understand how I could still love her or even care. She wanted me to desperately hate her for the way she had treated me and done a good person wrong. But after a few months that subsided and she asked was I gone come to the hospital when the baby was due and I promised I would but she didn't believe me. At the current time I had a girlfriend. But I hadn't seen her since graduation in 2011 and it was jan 2012 and I just had to see her again. I went to the hospital and saw her in the hospital bed drowsy from the drugs the doctor gave her for pain. And her mother and father spoke to me and caught up with me since I hadn't talked to them forever. Then i don't know how it happened but the baby was in my arms and I instantly fell in love. She wanted me to be his godfather and I said I would. The biological father only showed up 20 mins or less a day while she was in the hospital and I was there everyday morning to night. I was so in love with her and her son / my godson. The last day her mother asked me did I want to spend the night with her in the hospital because L didn't want the biological father to so I did and we talked, caught up, and I put my godson to sleep and held him in our arms and told her I love her and him both and gave them both forehead kisses. After awhile she wanted to send him to the nursery because he wouldn't fall asleep and I held her through true night as she cried because you know how a mother feels about letting her child go for a few hours. I comforted her through the night expressing my love for her and listening to music. The next day which was Sunday She was released and that very day we got together January 16th. Everything was perfect life couldn't have been better I had a complete family. My godson hich was basically my son because I was there for him more than the biological father and a loving caring girlfriend. Around may she said she was losing love for me when it was really another guy stepping into her life and she was cutting me loose. So she got with the other guy "J" and I was devastated to have everything I ever wanted stripped away from me by another when I was faithful, dedicated, and loving. I didn't do anything wrong she always had my attention, passwords, everything. I didn't even talk to other girls. May 31st she officially let me. Since then I had been single for 6 months I vowed not to love again and get hurt by anyone until I met "S" November 3rd 7:46 p.m. We were just friends who met on a social website (FB) she only stayed a few miles away. November 25th we became a couple. I gave my heart over again. We have everything In common and want the same thing in life as far as goals, marriage, success, etc. it seems a angel was watching over me and sent her to me to heal my broken heart and make me love again. And that's exactly what she did. We've been going good until now. Let me remind you me and my ex L never stopped communicating because I always wanted updates on my son. We still loved eachother of course We just figured it wasn't meant to be. But tonight around 2:17 a.m. She texted me saying was I up she needed to talk to me once she got home I said as always I'm always up and to tell me when to call. When I did she told me she had a good time with her friends and that her friends had her listen to a song they liked called "what love is all about" by Anthony Hamilton and she told them it reminded her of me. And her friends want her back with me knowing the nice gentleman I am. So she told me to lisen to it and once I did tears fell from my eyes as I did. And she knew it brought tears to my eyes by the break in my voice. She told me I was too good for her that's why she always wanted my to find somebody else because she didn't deserve me. I told her that I never wanted to search for better because I already had the best in my eyes. She still didn't feel like she deserved me though. And S my current girlfriend fell asleep on me tonight < it's a usual thing now :( > and this is when I needed her most because I told her everything about my past relationships and she was afraid that I my ex asked for me back that I might break up with her for her but she wasn't even here for me like she should have been she went to sleep on me instead of FaceTiming me like she said she would. I'm okay but Im just lost do I continue with this girl now a whole new person who I've only been with a month or go back to my ex who I've had so much history, time, and experience with. No matter what my love for her just can't fade no matter what happens between us. I don't know why I've tried everything so it has to be something. What should I do I'm totally lost. Do I stay with S or return to L and my son if she asks to be with me again (she hasn't said anything to me about getting back together though but I know it's coming) and this isnt the only ex who's been doing this. it seems like every sx wants me back because they know how good of a person i am and i guess theyre tired of sticking their hand in the flame and finally realized they had a good person and now want me back. how do i decide who deserves me? L is by far the only girl ive ever felt that way about the feeling of true love towards though. please reply and thanks so much for reading.

Whew, that's a long read my friend. Look, I know it seems like the right thing to do and that you'll be happier, but don't go back. It's never smart to go back, and it seems like every time you have, she's only taken advantage of you and hurt you worse. She moved on to other people, she broke promises (the virgin thing), she made the bad decisions. Don't let this affect your future and what you can make out of your life. Forgetting her will be impossible; trust me, I've been in a similar situation. But you're going to have to forget your love for her, and that is very much possible. Though you may not want to, though you may not think you can, try. You'll be happier with your current girl, and you'll be happier overall in the future. Of course ya'll can still be friends and still contact each other, but it can't really be more than that. A few off topic notes: I too am a band. Tuba for life, yo. This relationship sounds so much like Forrest Gump. Classic. But I guarantee it won't end the same. Alright bro, best of luck. I know you can find happiness elsewhere, and hope that you will. Hope I helped some.