Your situation is very familiar buddy. You need to ditch the friends and maybe explain yourself to your father. Of he doesn't understand you then as soon as your of age I would cut him off personally...Please don't ever let your self get so low that you think of hurting yourself or drugs. It's not worth it. I've always had a hellish level of depression and dabbled in drugs and alcohol because of this stutter. It makes thinks 10x worse. Go find your purpose in life and try to stop caring what people think. I know for some people that's impossible like with myself honestly I have ptsd over my experiences with ppl. But it's all about doing the right thing in life and doing things that boost your confidence & that you enjoy. Keep your head up man! Living with this will make you mentally tougher than 95% of people out there if you handle it properly believe me.