How do i confront my homophobic friend?

Honestly, my grammar is a little bad but whatever, CONTEXT: Im bi but have a preference for girls.
I have this friend who always calls me and my friend (who is lesbian) “weird” and “not normal”, when we’re talking about girls and saying how they're so pretty. Most of my friends don’t say anything about it though cause they think it’s a "joke"(bullshit). And she always says to this guy “I bet you still gay!”, and "I hope your parent hate you for being gay". I feel is kinda bad cause you're using sexuality to make fun of someone so I’m kinda pissed about that. Plus they don't even know his sexuality?? So why tf are you saying that. I wanna tell her I'm bi but I'm kinda scared and don't know how to tell her. :(