I second Cindie's sentiments. It just sounds like he's pretty much gonna do what he wants, and you're expected to come around to the notion as quickly as possible without consideration from him about your feelings.
See how this is problematic for you as a person and also as the other party in this relationship? And then you react in ways that are unbecoming and immature. So much sitdown time needs to be had here. You need to figure out if the relationship as a whole is worth it in the first place.
Bi poly female parent in a LTR.