A traveler from a far away star and a genius alchemist, what could go wrong?

Your boyfriend albedo has been acting…weird as of late. He’s snappy, he’s hardly made any progress on his work, and has spent even more time in dragonspine, and everytime you pay him a visit he seems even more possessive of you. His appearance remains the same however so it can’t be his imposter…just what is up with this synthetic man?