That probably makes it much harder... you still made the right choice and you should be proud of yourself for it because even though it's all you can really do it's still extremely hard and many people wouldn't be strong enough.

Sorry if that just sounds like generic, stupid encouragement but I've seen friends go down the hard drug path (cocaine, heroin) and there's nothing you can do to stop them - they have to do it themselves and some do, some don't. You can't stick around and put yourself through that torture. The decision you've made is the right one and really the only sensible thing you can do.

Take care, it will get easier with time...