Depression problems!!?

ok so like im 13. i never used to be a sad kid. but lately ive been insanely depressed. always crying and being upset. I had thoughts of suicide and stil do, iim just too terrified of tht. But maybe it because this guy tht liked me all of last year now has a gf when i like him. she is so mean to every1 and then so nice to every1 at the same time. barely any1 knos the real her. i do becuz she is my ex best friend from 5th grade. i also get dpressed because i have all of these kids at school hoo make fun of me sometimes. not like really making fun of but it stil hurts u kno? i also hav it at home as wel. my parets suk! i understand they wasnt the best for me but they dnt understand anything and they are always being mean. my mom is crazy and i seriosuly wish i had other paretns. soo thts a SUM of my story.lol so can any1 help me get over this? or tel me if i hav a good reason to be depressed or stupid? is it hormones? idk!! plezz answer thank u soo much! ::)))