Relationship. I feel we are very distant but he doesn't care

My relationship with my bf is bad. We have lived different lives and I don't feel he understands me.
This year he has been going to night clubs very often and trying new drugs, unlike the previous years. I don't feel fine about it, but he is glad to share moments with friends and making new ones...but he didn't invite me, and in his group there are women. I don't go out often, because first of all I have to study and work (he doesn't work and studies little -.-) and second because I don't have many friends and they don't go out much. All he was excited with this year was getting to the weekend. I tried one drug to share something with him and try to connect, but I don't feel good. I wish he was excited for better things and improvement.
Once he had an overdose and called me for help. I went and helped him. Later he said he had a hard time and he had to stop and change his lifestyle... So he said "ok, I won't go out and I will save money to travel to Europe (we are from South America); thus I will have a motivation to get calm". (He knows I don't have $ to travel, but his parents give him). I said it was ok, but later he wanted to go back to clubs, so I got angry. I can't stand it. And now he is in Europe. He has been so "happy" this year that he told me he loved me more... but I don't love him any more. He makes me have bad times as he wants to live things alone, not with me... I want to leave him. I don't feel he cares about me. He's so selfish. But the problem is that we go to the ame unervisity, same career.

ANy idea or suggestion?

My relationship story isn't much different than yours except I participated in all that madness. Now I find it extremely hard to pull out of the whole thing, he not only has no intention of stopping but is pulling me deeper in. Seeing him without a substance/rave involved became fiction, whatever plans we make end up with a dealer. Cannot tell you how many talented brilliant people around me have managed to ###$ their studies and life up due to drugs (not only drugs, it's a whole lifestyle) and I myself have been on the verge. It takes flunking exams and getting a year behind or an overdose to make someone stop and think.

If I were you, I'd dump him and take care of myself and my future. You're not in the same wave-length at this point. I also understand his need to go wild and chase experience. Still, he needs to be the one saying 'I am done with it', you trying to force him to quit it will only backfire.

If you don't feel like dumping him yet and still believe he might change (unlikely, if he has no reason to change), then keep the relationship going but turn to yourself and make new friends. Give him the taste of his own medicine and have fun without him. He will get tired of clubbing and substances at one point, whether you'll stick around 'til then or move on is up to you.