One of the main reasons people use drugs is to change the way they feel. They can't stand the way they feel when they're not high, so they take, snort, shoot, or smoke somthing that changes the way they feel, temporarily. Until you discover and address the feeling you're trying to change, nothing will really change. As far as not being able to tell or ask your parents for help, I told myself that for 7 years. I thought it would kill my mother to find out I was using drugs. I couldn't bring myself to ask for help because I didn't want to disappoint anyone. When I finally had to call someone to bail me out of jail (I didn't think that would ever happen to me!!) all she said was "thank God you're on drugs, I thought you had gone crazy". She was angry, upset, disappointed, and all the other things I was afraid of. In spite of all this, she still loved me and helped me get the help I needed.