You're right. Because his writing would imply that he is indeed fluid. The issue is that you are then presented with this ultimatum of a choice that is "his way or no way" when it should be a discussed and respectful process.

Halsin says "At least I tried."

No, Halsin, you didn't try. At least not to build long lasting connection and building upon deep rooted feelings. You did try to get laid and failed, though.