It's amazing how similar all of our stories are. I noticed the exact same changes in my spouse when she got on both adderall and vyvanse. They turn into completely different people that you never knew existed.
Unfortunately, as you said, there is no telling them that this drug is causing both him and you lots of problems. As an alcoholic I know there wasn't much telling me that I had a problem until it was too late. He may have to crash and burn on his own to realize what he is losing.
I wish you the best of luck and hope you soon find happiness.