Sometimes I Just Don't Know

In my life I have gained and lost more friends because of drugs than anything else. I used to gain friends because I could get anything in the best quality in any quantity. I am losing more and more friends because I quit doing everything. I don't judge people because of any drug they use, but the stereotypes placed on certain types of drugs are generally true. From alcohol to meth to peyote to pcp to new stuff that has not been made illegal, I do not judge people for their use of the drug, but the extent that they go to use or keep using is what I consider. The lifestyle of a person can be adversly affected or favorably affected depending on the type of drug, how often it is used, the cost of the drug, the potentecy of the drug, and the expectations of the user. My best friend is steadily using more often, potent, expensive, etc. and is having to lower his expectations on his lifestyle. Once his lifestyle becomes completely dependent on drugs then I cannot keep him as a friend. I've lost to many friends this way. I quit, but I can't get my best friends to. My best boy allways seems to keep on using and still succeeds in whatever he tries, but the drugs are starting to take over. I quit by locking myself in a room for two weeks and had someone bring me something to eat, but I was a 16 year old highschool drop out. He cannot afford to do that. Anyway, I have faith in him, but he is one of my two oldest friends that I have left. So, right now, all my efforts could not help because of the way he is so this time I just don't know what to do.