Confused (stay or go)

I have been with my boyfriend for almost 5 years. About 6 months ago we broke up for 3 months, and my boyfriend had a female "friend" he was hanging out with while we were broken up. We have since then worked things out and are back together. We have been better than ever since we got back together, but last week I snooped threw his phone and found text messages from another girl I didnt know. I was in tears, and confronted him about it, and he almost started snickering when I said something which sort of enraged me. He proceeded to tell me his best friend and him had met this girl 2 nights before out at the bar, and that his best friend had used his phone to text this girl, because his phone was dead. I still was kinda weary of it, but he proceeded to grab my face and look me in the eyes and tell me that I was the love of his life, and if he didnt love me, he wouldnt be with me and if he wanted to cheat he would break up with me and be with other girls. I sorta believed his story because his friend is a hibitual cheater on his gf of almost 8 years. Well a few days ago a girl tried to add my boyfriend to facebook, and tried to send him a message. Being the protective gf I am I felt as if I needed to message this girl off my facebook account and ask why she was adding and messaging my bf. She proceeds to ignore my message for 2 days, and finally wrote me back and said she had something to tell me. Her version of the story goes like this...She proceeds to tell me my bf approched her and her friends at the bar, and got to talking(small talk..work, hobbies, ect) she said he bought them a few drinks, and that was it, well she proceeded to tell me that my bf and his friend followed them to another bar, were her friend worked and they let them come in after hours and hang out. Well upon going their she said shortly after arriving my bf asked for her number and she told him she didnt feel comfortable giving it to him, so she said she looked him up on fb and saw he was in a relationship and she apparently went off on my bf and from her version my bf denied me still even with my picture in his face, and then proceeded to sit at the back of the bar and played a videogame. just a few side notes, this girl claims to be a lesbian, but on her fb she is going on dates with a guy, I also decided to call the bar that her friend supposedly worked at to find out what time they closed and they close when the last person leaves, and her friends name was melissa, well melissa does not work at this bar. So their were numerous holes in her story. My boyfriends version was that she came up to them, and that they only talked for a few minutes, and that these girls followed them to the other bar. And still that his friend was the one who got the other girls number. I need advice on wether or not I should believe my bf or this girl. I do think my bf is lying about somethings, and it def hurts my feelings especially since we have been doing so well lately. But at the same time I dont know anything about these girls, and her story is spotty. I have been really sad about this bc I blew up on my bf and now he is being really distant. I feel as if I have over reacted to something that I really dont know what happened, and should have just left it alone. But at the same time I feel betrayed if my bf did try and get a girls number, and denied me when she showed him my picture. I know my bf like the back of my hand and I dont really see him doing that, but like I said I wasnt their, and all I can go off of is her story and his. What would you do in my shoes? drop it, and move on with the relationship, or drop him because the story is shady and I really dont know if he is telling the truth?

Do you still need advise ?

Do you still need advise ?

If your boyfriend was a good upstanding classy guy, he would have told his friend to text the girl later with his own phone. Sounds shady. And you claim to know your boyfriend like the back of you hand. That's what they all say. If you are questioning him, then you clearly don't trust your own statement. Everyone's story has holes, but if this girl was truly being text by your boyfriends friend, she then does not need to make up stories. And I think you are trying to hard and need to find holes in her story. You may not go now, but I don't put a happy ever after with this guy.