My son is a recovering addict. He began using drugs in high school. His dad and I moved out of state after he graduated and he seemed to put his drug abusing days behind him. Then he moved back to where he grew up and soon became a heroin addict. He is now back where his dad and I live (after rehab) living on his own and doing well again. I think there are very often triggers to drug abuse. Where my son grew up is a trigger for him. Removing him from that situation did help him.
Before packing up your bags, though, and leaving to a new area, I suggest your bf go through rehab where he is now. See if he is really serious about getting help for his addiction. No point in disrupting your life if he isn't really serious about changing his. Addicts are notorious for telling us what we want to hear. They may even believe what they tell us to a certain extent, but doing what they say takes a great amount of fortitude on their part. Actions speak louder than words where addicts are concerned.