well the first step is the hardest and your taking it now....the people on this site are more than willing to help you... but ultimately it's up to you....would you have any availability for counseling? it ill help remove the idea that you have to go through this alone...your young with a full life ahead of you do this for youself ....it will be difficult but it will be more than worth it.....Good Luck
Jambo
You need to make a true commitment to getting clean, which involves detaching yourself from anyone who you get the drugs from. Decide if you want to tapper off the stuff or go cold turkey. You really have to want to do this, it won't happen with a half a$$ attempt. Your very young, with a full life ahead of you...if you get off the drugs. If not, your future is very grim....poverty, jail, death.
Keep posting and reading on this forum. Everyone here will help you thru this. Make the smart decision before your life is ruined.