I think I’m bi but I want to be sure

I’ve always liked boys but lately I’ve been attracted to girls, I haven’t done anything with a girl like I have with guys so I’m not sure. I don’t feel like I should tell people if I’m not 100% sure, but I also don’t want to hide if that’s who I am. also my mom says she doesn’t “believe” in being bisexual she believes you’re either straight or gay, and I feel like I’m neither 😅.