My boyfriend always gets drunk wtih other girls w/o me.

My Boyfriend and I have been together for a bout 6 months.
and as much as I hate to admit it, he doesnt treat me exactly the way he should . (I think, and most of my friends realized it). well last friday, he went to a party at this girls house (who I absoulty effing hate and HE KNOWS IT) and he got really drunk and smoked weed for the first time. now hes planning on doing it AGAIN. he never invites me to these parties. and I dont go out drinking without him because im scared of what I might do. and he knows I get mad at him when he does it but he does it any way. hes always trying to impress girls even though he has me. I always try and talk to him and it doesnt work. EVER. so what should I do? some peopel say I should break up with him but I just cant. and my one friend's boyfriend is gona talk to him about how di*k it is to push me away like that. (hopefuly hell listen to another guy). Oh and another thing : He goes to a different school than me, he plays basketball and I swim. we see eachother like once every 2 weeks. and we almost broke up because of it but decided to try and make it work. but hes not helping by not taking me to these parties where he just gets wasted. how am I suposed to trust him DRUNK? I cant because its not something to trust someone with. correct me if im wrong.

hey ok your hurting cus he is pushing you away but if he does all this and doesnt think on how it is affecting you then he is not worth it and you should break it off.If your mates boyfriend talks to him and that helps then try again but otherwise leave him and find urself somone better somone that deserves you as much and you deserve them.

You cant control someones elses behavior, and you cant rely on your boyfriend or anyone else to make YOU happy. He already knows how you feel about what hes doing, but continues doing it anyway, which only means he doesnt care! He obviously isnt inviting his girlfriend for a reason.
Trust is an important part of a relationship, and without it, there really is no relationship! I would give him an ultimatum, if he continues doing what hes doing, tell him that you will have to end things with him. That will be a sure sign if he cares about you, or not!!
I played sports in school, and if he plays sports, he should have signed a code of conducts. Which means "he is NOT allowed to attend parties where theres alcohol and drugs! He will get penalized for his actions if the coach finds out.

You cant even trust yourself when your drunk how are you supposed to trust him? hun this arrangement is not going to work no matter how hard you try. You need to admit it and accept it, the fact that he doesnt really care and respect your feelings enough to even invite you to these parties is a pretty big sign! have you asked him why he doesnt invite you? he should be taking every opportunity to see you if you only see each other once a fortnight! sounds like he likes the non attached life better than the 'I have a girlfriend I should treat her right' one. You dont deserve this, I think the best thing here is for you both to go your seprate ways for now, so you can party and get drunk when eva you want without worrying about him, maybe losing you may wake him up a lil but either way its not going to work.