How can i fix myself ?

maybe you should try online school, that's what i do. Its a lot less stressful and you dont have to put up with all the annoying people lol. just remember it will get better, i was recently going through some hard times too( im also 17) but you only get one shot at life, once your gone you cant come back, so dont take it for granted. if you need someone to talk to you can email me