How did you know you were part of the lgbtq+ community

I'm having a gender Identity crisis. I think I'm bisexual but at the same time I'm not?? I liked both a man and a woman before but It doesn't feel right when I call myself bisexual ?

I'm scared to label myself as part of the lgbtq+ community because maybe I'm actually just a straight ally who's just doing it for attention /although I've never said it to anybody irl/

I think I'll fall for someone regardless of their gender as long I like them, I like them but maybe it's just my thinking or morals?? But I do plan to just die by myself and not marry someone so yeah