The very most for me I guess has been around 3 months or so, 5 if you count being in jail. But in reality, the only problems my use has caused are that
1)My mom disapproves of my using
2)I have gotten out of hand a few times and went overboard with my use for a month or two.
3)Straight minded people who are against all drugs don't really like me(Which is more there problem for judging me, so fuck'em)
Thats really nothing compared to the benefits I get from using, I can still work,sleep, go to the gym, etc. I got a good solid group of friends with similar beliefs, and those who don't share my usage patterns, don't judge me for it and are there for support, and to let me know when I go too far.
So I don't ever really plan on quitting everything anytime soon