Am I bi or straight?

I feel like a lot of questioning girls wonder if they are bi or lesbian, but I wonder if I’m bi or straight, and I’ve already come out to my friends but sometimes I still wonder because I’ve never had a experience with a boy or a girl and maybe I’m just seeing how pretty girls are?

Also I don’t want to come out to my family if I’m actually straight because that just seems to permanent and they’ll be accepting but I just want to be sure, any similar experiences? How did you figure it out?