Help!!

My parents are extremely homophobic...they were talking about how stupid it was to go to a gay pride festival... I feel like I might be bi but I’m too scared to talk to them about it and I feel like they would disown me. My best friend said that if I was lesbian or bi she would still be friends with me but not as close because she doesn’t want me to want to date her... I don’t know what to do? Please help!