Alright, so this was my experience as a bisexual.
When I was younger I noticed myself obsessed with characters same gender characters. Of course I didn't think it was a crush because I hadn't had a crush on the opposite gender. That was until middle school when I started having real crushes on my opposite gender.
So I was like of course I got to be straight.
But I started thinking back to all those obsessions on fictional characters, and I was like wait ...am I gay?
I started having crushes on some of my female friends, then they turned out to be non-binary. I realized that whatever pronouns or gender I have to call them doesn't really matter to me.
I identified as heteroflexible for a little bit. (Like bisexual but with a clear lean to the opposite gender)
It was in eighth grade I started identifying as bisexual. However I found my identity under internal and external scrutiny.
The homophobia around me made me less likely to come out to people.
Lots of people told me I was pan because
"only pansexuals can like nonbinary people" not true btw
And I noticed that my sexuality tended to shift like abrosexuality.
I did more research and I now firmly identify as bisexual. I feel like it's a very vague term and I don't want to have to like define every part of my sexuality.
My point is that you may go through a lot of labels and that's okay. You may settle on a label that's not perfectly descriptive of your sexuality and that's okay. Sometimes people who have the exact same experience will pick a different label and that's okay.
The point is be yourself no matter what label you choose we'll support you.