Ah, I'd urge you to kick the stuff. I know it's your body and your right, so I'll respect it. Still, your so much better than that.. We've all experimented our fair share, and chasing a buzz is fun and exciting in its own way.. The end game, however... has and will never be good. Drug use has been going on long enough that all the roads have been discovered.. Either you quit and regret ever using... Quit, and while not proud, don't regret because you learned from your mistakes.. You overdose and die... You go to jail, perhaps make a habit of it.. perhaps not.. Or you continue using while your body deteriorates effecting everything around you.
Again, I really don't care if you quit or not. I just want the best for most people. And you can feel good without drugs.. hehe, its possible. I've had to fight and scrape with some friends in the past to get them to come around to that notion (friends and loved ones dont qualify for your body your right understanding).. you might have to go through ha little hell (withdrawal) to get there, but that's part of being a strong man or woman.. You'll be all the better/stronger mentally for having kicked it.
Or you could just continue on.. whatever.