I'm 23 now and I've been having a similar problem for quite a long time now except for different reasons. Actually I started feeling a need to stabilize as soon as I started having serious feelings towards girls. It complicated my life a lot as at the beginning I wasn't really aware that my peers think in a completely different way about relationship and sex. Problems caused by this were actually an indirect cause of drug abuse for me. I have been in numerous relationships mostly with older women (I mean older than me, e.g. I was 19 and she was 26 etc.) but each time it ended badly for me. And when I started getting my life "straight", I lost contact with all people I had known because of constant anxiety and depression. So I began wondering when my life was truly "straight" as now I don't even know how to talk to people... Anyway, it bothers me that I don't have friends now and it really bothers me that I'm alone, this is at variance with my character, personality, and habits.
Now that I'm completely alone, I don't even have courage to go out as I'm feeling weird alone in a club or pub, or even walking in the park. It seems to be a vicious circle, no friends = no going out, no going out = no friends. Eventually I stopped caring and I stopped seeing my current life in the place I began to hate as something long-lasting. I know 23 is still young but given my experiences I feel like I was 40. I'm constantly told that there's still time etc., but as a matter of fact the more time goes by, I feel the less chance of settling down I have as successful relationship more and more seems to be something happening only in books and movies.