Trusting My Boyfriend?

Let’s start at the beginning… I met this guy on Thanksgiving of this past year and we hit it off great. We didn’t get to see each other much, but we talked on the phone and text messaged each other a lot. We started sleeping together right away and it just felt right being with this guy.
There were a couple times in the beginning when I would come across something and consider breaking contact with him, but after confronting him about it, everything seemed to be ok. We became official a few days before New Year’s Eve.. he even told me he loved me around Christmas time! I admitted my feelings the night we became official and everything seemed great.
I know he has a lot of female friends and his best friend is also a girl, whom he dated for a while a few years back. Well recently, I’ve been noticing one of his girl friends leaving him a lot of comments on his myspace (he never accepts mine) and added her and his best friend to his top (I’m not on there). After reading through the comments, I figured out they were hanging out late one night at his house, watching movies and she was doing her laundry?!… the same day he came to see me, but had to go home after a few hours because he had things to do.
We both have profiles on another website, and I was bored one day and ended up on his page, when I noticed in the “You spend a lot of time thinking about” section he had put “thinking about this cute girl named ____”, which is the friend, not me. I asked him about that and he said it wasn’t a big deal, she just suggested an edit to that section and he accepted it… even though its still there a few days later and he knows it hurt me. Also, while we were hanging out one day, his phone went off for a text message and we were laying together while he opened his phone. It was a picture of the friend wearing a shirt with her boobs hanging out and she was in a sort of seductive pose… I didn’t say anything, just got real quiet for a while.
Whenever I confront him on things now, he says I’m being paranoid. When we first got together, he would always send me cute messages and call me cute pet names… and now it seems whenever I hit him up, I’m just annoying him, he barely tells me he loves me… and is always busy. Let’s not forget what I found out a couple weeks ago. (While I was down in Fresno at my friends when we first met, he told me he couldn’t go with because he was going out of town with his family. Well, while he was gone, he broke his hand.) He was talking about his most recent ex and said something about what happened between them one weekend and he broke his hand. So I asked him if it was that weekend I was in Fresno and he said yes. And I called him out on him telling me he was with his family, but yet he was down in So Cal trying to patch things up with his ex. And he said he only lied to me because he didn’t want to make me mad. I told him that was fucked up because he’s complaining about how she played him when he was playing me from the beginning too. He said none of it matters now because he’s committed to me and only me. He said he’s never slept or done anything with anyone since the first time with me, and before me, he didn’t do anything for 6 months… I’m starting to not believe it.
Honestly, I’m totally torn on what I should do. I really like this guy, but I don’t think all this **** is worth it. I want to call him out on everything, but I’m scared of what’s going to happen. Any thoughts or advice?
P.S.
I’m turning 24 next month, he turned 21 at the beginning of this month. We see each other, maybe once a week, due to financial problems.