i wish that someone could tell me that i should not do bad things, i like a boy that don't like me, and i don't know what i should do?.. -.- i really need some help... or some words, from a stranger or friend...

i hate myself, i wish to end all this bad things i have done to people i love..... why can i not stop hurting them... why can i not even hold my own promise? i just don't know, what i should do...