In the last few weeks I have gone to set out to off myself twice but failed.
You're joking, right? Why would you want to off yourself so much in just a few weeks? Is that because you are depressed?
I think it's because I need more drugs
Offing yourself seems like the thing to do when you are strung out and have no more drugs. Get yourself into a rehab as soon as possible. You will die otherwise if you don't!
All I need is a new bag of this shit.
I really believe that it's best to try to get help or get into rehab. Your life is worth more than drugs and getting high, and you have a lot to look forward to in the future! How would you family and friends feel if you actually succeeded in this?