Cheaters....

So, in the beginning of our relationship, my bf was messing around on me. He swore to me that he wouldn't do it anymore. Lately we have been talking about marriage. Well one of the girls he used to flirt with is now back in the picture. He promised he would n vet talk to her again but now they back to talkin cause she has been giving him money and he gives her xans. He also has been having pictures of his ex in his phone. And told his cousin that he hooked up with this other girl last week. My daughter is almost 2 and absolutely loves my bf. He has been there since her 1st bday. I'm torn on what to do. He don't know that I know he tol his cousin that. He don't know I go through his phone a lot but he deletes everything that him and 2 o these girls talk about. I love him but in being pushed away and don't want to be second to no one! Also, used to, we would have crazy sex! All types of positions and everything. Now, he just lays there and I have to do it all. I just stopped giving him head since he stopped giving it to me. It's like he's scared to touch me now! But yet, he ask these other girls if he "can kiss on it" and that he's thinking of them. Uhhhh....I just don't know