Help confronting my boyfriend please!!?

My boyfriend and I have been going out for a little bit over a year. He cheated on me in the first 2 months and we've since gotten over it. I've never done anything wrong to him and he never did anything after that one time. One day a girl texted him who is known to be easy a "heyy :)" and I dont care if he talks to girls I learned to trust him again but since it was this girl and the way the text was I thought they had been actually texting. So i asked him, and he swore they had not. 5 Months later I'm using that girls phone because i lost mine and i see texts from each other around the time when he said they had not texted. I confronted him but let it go because it was not the time to be fighting. Lately I have been complaining a lot because he seems to be disinterested and it is starting to get to me. We were at a party and we went there together, but he didnt come up to me once during it, I know I could go up to him, but isnt it nice to feel wanted? Instead he was going around talking ot other girls and guys. When I confronted him about that he saiid, " I dont need to worry about whether or not you are being talked to." I didnt like that, but I took it because I didnt want to keep complaining. And now the lying thing is starting to bug me and I want to sit down and have a talk with him because he's been making me feel bad for not being happy and complaining, but its only because, there are stuff to complain about. Can you help me think of a nice way to say everything im feeling?