Struggling with Sexuality

I’ll just start off with saying I’m a 17 year old girl, and I’ve been interested in girls since I could remember. But I’ve also always like guys and have only had sex with them. And As dumb as it sounds I hate telling people that I like girls or even getting asked if I do as I get really uncomfortable because they ask if I’ve ever been in a relationship with one or have done anything with a girl to which I have nothing to reply with. And I sometimes question whether or not I’m really bisexual because aren’t straight girls attracted to girls in certain situations? I know I’ve always wanted to be in a relationship with a girl and just never got to try it but it’s hard to identify as a bisexual girl when no one really takes it serious and start asking me questions to the point where I question if I’m really gay myself. I’m sorry this whole post is a mess I’m just so confused with myself