1st off, don't ever say your mom doesn't love you. that's a big fat lie
2nd, if your friends dislike you because you changed classes, well that's a very stupid reason now isn't it?
3rd, get some freaking help! if you're feeling that depressed over such little shit, you need some therapy. get some help, stop feeling sorry for yourself, and don't post stuff like that here (you're more likely to get posts saying "so kill yourself already" than helpful posts)