How to feel better about depression?

i have been bullied for a long time both physically and mentally. it has destroyed me completely. i have ended up with depression and i have attempted suicide. i believe i'm no good and that i deserve this. every morning i wake up nauseous and don't want to go to school. i have a physiologist and consequently, my mom (i have no dad) and teacher knows. since i hang out with only guys as my friends they know and try to Comfort me. nothing seems to work and i feel more isolated. im in Extreme emotional pain. and have only one message to get across in hope. is to stop bullying. because it has destroyed me completely. i once have had dreams to become a doctor or teacher to help people but now it wont be possible because i have become so useless physically an mentally. i used to be the best runner in my grade. but that's over now. i was actually very friendly and it wasn't some random person bulling me but a group of girls who i thought were my friends that's why i hang out with guys now. girls can be so cruel. i have to be transferred to the psychiatric ward and i don't want to. this has destroyed my life any advice?