Oh, well done....congratulations on that.
Easier said than done, in my experience though. Can I just say, make sure, as someone said before, get a plan in place, so in the hard, dark times, of a broken heart, you have something to occupy, and keep yourself well with.
Anything, just make sure it's all about you and makes you feel good. Also, educate yourself, and get help with what all this drug addict rubbish is all about. The more you can understand the routines that an addict will follow, the better prepared you'll be, to say, 'come back when your done.'
Take care