I know the feeling! I moved away from home two years ago and have yet to make new friends and the old ones hardly ever keep in contact with me unless I contact them first. I guess I've learned to just be alone more often although that gets me depressed a lot. I'm terrible at making friends so that's probably why I havent yet. Do you just not talk to those friends anymore? You can always make new friends? Easy for me to say though.. hard to do, but maybe not for you?