I would be bummed if my boyfriend isn’t bi

How would you want your wife or gf to bring up ask if you’re bi ? so I want to make sure my bf doesn’t feel judged - I think he’s bi , he likes getting fucked in the ass by me, and maybe he just like anal stimulation, but I have a fantasy of him getting fucked by a real dick because I don’t have one and I wished I could feel the inside of him how he does with me. That’s my kink. I asked him once if he was gay and he got defensive which I later realized that wasn’t the right question and maybe that’s why he doesn’t bring it up at all because he thinks I will think differently of him but I just want to know and really wish he was bi I’ll be bummed if he’s not haha :/

I don’t have friends to talk about this stuff without being judged. I love sex and I want to try things at least once to see if I’ll like it