I think you're externalities your internalized biphobia here. I'm not saying this is all in your head because it's not--society is fucked up and bisexuals have a lot of bullshit to put up with that they shouldn't have to. But the reality of the situation is that the world is gonna change, the world isn't going to make you feel comfortable in your own skin. You've got to accept yourself, you need to tell yourself that those things aren't true and believe yourself. And as much as you can, you've gotta try to insulate yourself from people who are biphobic because they will make it incredibly difficult for you to accept yourself and be comfortable with who you are. It's complete bullshit and nobody should have to deal with all of that, but that's the hand you've been dealt. I'm sorry you're going through this, I'm bipolar myself, and I've internalized a lot of the stigma surrounding mental health issues--that we're broken, crazy, over dramatic, less human than everyone else. It sucks, and hearing random comments about how "bipolar" someone was being basically confirms all of those things to me, so I get, I understand completely just wanting to prove to everyone else that they're wrong--but you can't. You can't prove to everyone here that they're wrong, that they're all biphobic, the world isn't going to treat you differently, the world will keep telling you that you're sexuality isn't valid, just as the world will keep telling me I'm broken. The world won't validate you, only you can do that.

Ok I don't know how to work this in organically, so shirty transition buuut find friends who make you happy. It doesn't matter if they're a good person, if they're trying, if they aren't intentionally doing anything bad, if they're right or they're wrong, whether it's reasonable for you to be upset with them--none of that shit matters. Do they add more to your life than they take away? That is all that matters. Anyway, sorry this got rambly, I've gotten like 4 hours of sleep in the past few days. I'm sorry you're going through this, feeling uncomfortable in your own skin is the worst--I hope things improve and you feel better, sending internet hugs your way!