Help me i'm afraid I'm losing the woman I love

Well lets start from the beginning I was married to another woman when I met this most amazing woman my marriage was already going down the drain she loved other things more than me she and I were both unhappy so we decided best thing was divorce and we both move on with our lives well we did the woman I had met I had fell in lovewe hit it off things were looking up we were madly in love couldnt be separated even a couple hours was hard It was the best feeling in the world she was happy I was happy sex was amazing and eventually we decided that we wanted to start our own family rewind just a little bit before everything had got this great I was dating this woman I left her because I thought that I still had feelings for my ex wife so I went back all because of a text and a phone call me she had left me well two day's after I tore the most amazing womans heart out and left I went back to my ex but quickly realized I had made a mistake and by the third day I was back asking for forgiveness she forgave me and we moved on with our relationship well lets fast forward a little she got pregnant and moved in with me she was 17 and I was 19 everything was perfect we had our first kid a little boy he is three now everything was perfect other than she quit school and didnt try to get her gedthan I lost my job that I had had quickly got 2 jobs to make up for the money we had lost but we were ok then all we needed was each other and thats how it was well a very promising job opportunity but it required me to travel so I went I spent one full month away from home in new jersey away from them but I was ok with it cause I had my checks sent home to her for her and my son and she sent me what I needed to live on up there well I got to come home for five days so I did I came home suprised her she was sleeping when I got home I crawled in bed with her nudged her shoulder told her I was home she rolled over and gave me a kiss guess yall know where that led to but anyways I went back after five days shortly after I got it okayed with my supervisor she was able to come and stay with me well she got pregnant in new jersey after two months up there after thejob was done we returned home and was okay but again I was without a job again but luckily I had made enough for us to live on for five months just two weeks after I found a job were im am still currently working well things were great for about a year after I got this job then she wanted to move get our own place for us and our two kids well we did it was this time last year thats when it all started she started acting different she did want really much anything to do with me she said she was starting to feel unhappy that if things didn't change that she wouldnt be here anylonger and that I should be afraid if she was talking to other guys well I asked had she been she said two one as a friend who was in a different state who she went to school with and the other was my own family that she had dated in the past feelings for him had come back up he was a low life woman beater and I told her that was why he went to jail in the first place she didnt care she loved him or so she thought I left let her keep the place moved back to my old place and a couple weeks later she was at my doorstep in tears saying she had made a mistake that if I wouldd have her back I said yes and was happy that she came back to me she told me nothing had happened between them she never even seen him because neither one has a vehicle and she doesnt have a licence to drive anyways she told me that she was sorry and wanted me to come home so I did with all the bills we had I wasnt able to buy her a ring so I asked mom if I could have grandmothers old ring to propose she never said yes or no when I proposed she wore the ring though and was excited or so I thought shortly after this the friend she had the other guy I mentioned told her he had feelings for her and after that it went back to the being the sameas it was with my cousin I moved out yet again this time for a couple months during this time I was always coming over something I didnt do the last time being there for her waiting hand and foot on her watching the kids for her all day while she slept knowing I had to work that night I eventually totalled my car on lack of sleep I was exhausted she didnt care that I wrecked just that I was ok and wanted to know when I could watch the kids again well thats when I put my foot down and toldd her either it was me or him if he didnt go I would and I meant it two weeks later she called me told to come home that she was done with everyone else that she wanted to focus on things she has had and has always had instead of things she might have with someone else well I believed it and six months later two days before her birthday Christmas day she told me she was unhappy that she felt like nothing more than a sex toy wells after Christmas had passed I was still trying to fix everything that was bothering her well she come out and told me she had been talking to another man but it was only as friends well I believed it again shortly after it was an everyday thing seemed like the only time she was happy was when he would text her eventually it made me upset and I told her everything was happening just like before that if it continued she could leave then she blamed me for her quitting school and not getting her ged or her licence when shes the one who always said she dont have time to and it was never a big deal I never incouraged her to get her licence but I did her ged because education was always important then she said I was saying she was stupid because she hadnt well it kept going on and finally she moved out I get the kids when im off well she waited a couple week s before talking to me again and she told me she loved me and that she just wasnt in love with me like she used to so I asked her if she wanted space or just to be alone she suggested being alone and going on dates with one another to see if we could spark her love back so I agreed but a month went bye I get my income tax return back she wants just the two of us to stay together in a hotel so we do for two weeks we stay in a hotel the only time we left was to go out to eat or shop a little bit and when I had to work it was great she was happy we had a good time we made love to one another just like we used to it was great but a couple days after we checked out it went back to the same she said in was the most fun and amazing time she had had in a long time and I told her why did it have to stop with no reply to that she said she still felt that way towards me she was still texting this other man and had been ever since our problems started again and eventually she came home we got into it one night pretty bad so I left went for a drive to clear my head I came back she had been using my old tablet that I used before I got a new one I unlocked and there it was plain as day the last two days she had been talking to this other man telling him she loved him and wanted to be with him and a bunch of other garbage like pics of her in brawl and panties that I just bought for her nothing else on her part but **** pics from him like she was looking for someone to treat her like a sex toy when thats the exact problem we were having I woke her up and asked her if ahe had anything she needed to tell me she denied it so I got angry I packed her **** made her get in the car and took her to her moms all she could say was I didnt trust her then I pulled out the tablett and said I trusted you but when you said yall were just friends and look were it got me heart ache again I tolď her her that I still loved her and wanted to work out our problems but if it was ever going to happen he had to go every other man had to go besides family she said ok well needless to say she called me said everything was over now to come and get her so I did I believed her again not even one day later we was in town she told me to answer her phone for her that it was a phone call it wasnt it was a text from the same guy telling her that he loves her and called her his boo and one and only and cant wait to come see her so I brought the phone to her and asked her what was this she was speechless nothing to say I dropped her off at her friends and went and got my kids from there grandmothers house and went back home she keeps trying to talk to me but I refuse unless its about the kids or when I pick them up what should I do she is the love of my life and I want to bè with her so please help I dont know what else to do she has asked if she could come over and make dinner for me and the kids as a family again but i just dont what to do anymore please help any advice would be good