Can i have some advice?

i feel bad because i keep letting my parents down which in turn makes them fight and i hate seeing them sad because tyhey do nothing to deserve that and i dont know what to do about it. I also keep making bad decisions and i dont know why. it kills me because i have a goiod life im in hockey and i have wonderful parents who all do is love me and i keep letting them down.. HOWE DO I STOP?