Dont kow what to do!! help

I am 18 my b/f of almost 2 years has been great until lately he has been kind of distant not really touching me or kissing me he doesnt give me any attention. I have always thought that he likes this girl in our class and one day he watched her walk a long distance to her chair checking her out from top to bottom over and over again he was really focused on her. last night I was playing on his cell and I came upon some text messages that he sent to this girl and well first thing this girl hates him a lot anyway he sent her messages begging her to talk to him saying o I miss you so much why wont you talk to me I miss when we used to talk please talk to me I just want to be apart of your life please talk I miss it soo much you dont know how much I do but I really really do I miss you your words etc... and then he says dont tell me b/c I will get pissed so I was like wow what an as*h*le we have been dating for almost 2 years and I have always thought he really liked her and he is like no so it always bugged me when he looked at her and then I see this and comfort him and he says it is nothing I dont like her I just wanted to talk to her. do you think that he really likes this girl and doesnt really like me anymore b/c he always think about her not me. but remember she doesnt like him at all not even being in the same room so there is nothing going on there. what should I do should I stay with him when he isnt really committed to me or really want me am I wasting my time. I do I get pass the point of always feeling he is thinking about her when we are making love or just hanging out or always feeling he is looking at her??? please help me!!!

I'm sort of in the same situation... Only my boyfriend and I haven't dated as long. And there was another girl... that we both had to get over... it was rough... took a long time. Everything is fine now... maybe you should justs let it go.. or confront him...
As for thee distant thing... Well that's where I am right now... so not even I know what to do.