[black_butterfly]

Honestly, take a step back and look at the situation. I hate to break it to you, but it seems kind of obvious that these girls are no longer interested in being your friends. Try talking to some of the people in your class, let them know what you are like and not what X and Y say you are. Getting to know them may lead to a better friendship, which would build fast because you see each other more often.
About X and Y, I can understand why you wouldn't want to do this, and I'm not saying to drop them like a hot brick, but I would advise you to find some other people to call friends.