No on cares anymore. I feel alone.?

For a while I have been feeling depressed. Nearly all of my friends have stopped talking to me.mainly from switching schools. So the friends I do talk to are by text every once in a while and I feel like no one cares about me anymore. My life just sucks. I'm 15 and my mom won't let me hang out with my friends. Or go to dances or just about anything. No one cares about me. Even when I got the stomach flu no one cared this hurt me alot because my friend Angela who I can tell anything to doesn't care anymore. And even my English teacher called me Emo today. I don't know what to do. I really don't.