I have a sort of extreme opinion, but I don't believe anyone is 100% straight or 100% gay. (But I don't believe people should call themselves bi just because they're 99% straight or 99% gay.) I just think there are way too many people in the world to definitively say you'd never fall for someone of a certain gender.

I am bisexual. But that's a bit of an oversimplification. I'm definitely attracted to femininity regardless of gender expression ("femboys") and find masculine women attractive ("tomboys"), but it's rare that I find masculine men attractive. My attraction to men in general is pretty rare and usually more like demisexuality. But it feels like such an insane mouthful to say that I'm gynessexual but buromantic because even then that's still not really giving the whole picture. So I just say I'm bi.

I found out I was bi in my mid/late 20s, I don't really remember when. Looking back on some of my friendships with boys in highschool I wonder if some of them I actually was romantically attracted to. As a kid I had a very difficult time knowing when I had a crush on someone, so there is precedent for me having crushes on boys in highschool and not realizing.

I'll close with this. There's nothing wrong with being "heteroflexible". I used to call myself that before I started calling myself bi. There's nothing wrong with being straight and calling yourself straight and liking a guy. (Insofar as long as you aren't lying about it.) Sexualities are just labels to help us better communicate our preferences in an easy way. Don't let the words define your attractions. Let yourself decide what you're interested in and then worry about what label to use later. 💜