"he's so young, he's only 22...can't he change?"...
Yes, I agree with Wicked. Of course he can change. Everyone has the power to change their situations IF THEY CHOOSE TO. No relocation, no outside influences are going to MAKE Cory change if he does not do the work INSIDE to make those changes.
Even so, are you willing to spend the next 10, 20, 30, 40 years going through emotional and physical abuse on the POSSIBILITY that he MAY change???
Everyone has said amazing things here. I hope that you can really focus on what YOU need to change for YOU and not what he needs to change for him.
HUGS and BE WELL.