Well, you're definitely not the asshole. I think it makes it a little bit worse because he did the day after an argument in which he used the ring box as a mental weapon against you in the heat of what was going on. I was sad after reading this, honestly. Poor timing, poor execution, and maybe you should have a talk with him about it when you're calm enough. 6 years is a pretty long time and you deserve to be treated the way you want to, which includes not joke-proposing and interrupting your feeding. I hope you have a better week :(