I'm being ditched again for my friend's boyfriend?!!?

Okay so i have been friend's with her for such a long time. We were super close during our junior and senior year of high school . But something changed around fall of last year she started talking to this boy. I encouraged it and i was so happy for her. Well little did i know things were gonna change from there on. On several occasions she would make plans with me then ditch me for him then he'd ditch her and she'd ask me agin to hang out. On their first date he taold her how pretty he thought other girls were and he didnt even pay for her. She'd always have to pick up tabs on his food. On New year's he was an *** to her. Then after all of this she asked my advice on whether or not to break up with him and i asked herr "what do you like about him"? and she couldnt answer me. After awhile she broke it off and than after a couple weeks she wanted to start going back out with him. I told her she should do whatever makes her happy. because she's my best friend and i love her and care about her being happy. soshe got back together with him. What really gets me is his personality. He is rude to me and our other friends , social akward(she's admitted it) , and only likes her to his self. He doesnt like it when were around and has told her that numerous times AND IT DOEESNT SEEM TO BOTHER HER! she would constantly invite him to places where we'd be even though he doesnt like us yet he has no reason not to. One recent occasion she invited him to a play even though i just invited her. she said that she couldnt help him not coming. they got all lovey dovey and it was wierd so me and my friends got up and left. And she said that i hurt her blah blah blah and she though i was her best friend. and that if i was just going to ignore her i shouldnt come to a concert she invited me to (by the way her boyfriend was coming). But i blew that off she even showed up to show with hickeys on her neck which i though was just gross and not her. i just dont get it iv'e been her friend for 11 years !!!! 11 years!! i feel like i dont matter anymore :( College is almost here and i dont know if i should just forget about her. She's become so nonchalant about my feelings. HELP!!!