My boyfriend got arrested in July and got sentenced to a year and a day and comes home in 42 days. He was a heroin addict up until he got arrested and he is an amazing guy except when he was on heroin.

He treated me well, never raised his voice to me, never fought with me, never called me out of my name. But he did steal from me, lie to me, and would be leave while he was using out of shame.

I told him I would leave him if he used because I knew that it would lead to him doing those things and his defense once it was all brought to light was he didn't want to lose me.

Now that he is getting out he says he doesn't want to even associate with anyone he spoke to before he went up the road and he doesn't even want to live in the area because he wants to stay straight now that he is clean from the shit but heroin is everywhere so moving really doesn't keep him away from it.

He told me in the past he would never give up heroin for a relationship and he has changed his own on that now and just wants to do the right thing since he is in the right frame of mind. I'm doubtful because he didn't choose to stop using, it was forced on him even though he could of used it in prison cause it isn't to hard to come across.

What's the possibility that he might actually want to stay clean, am I just fooling myself to give him a chance to prove he isn't just saying this since he is in prison?

EDIT: I couldn't be happier, he's home and it's amazing to see what a difference it has been. I remember thinking so long and hard about everything I had done up until the moment he got arrested and thinking how responsible I felt and it really made me question what I was really so afraid of. Knowing what I know now, it was worth it and I'd do it all again.