Bisexual or just imagining things?

Hey so I'm sorry for yet another post like this, even though I know that no one has the answer but me. I would just like some opinions before I decide to talk about it with someone I know.

I'm a 20 year old girl and for as long as I can remember the idea of being bisexual has been somewhere in the back of my head. I just never really listened to it until recently. Now I've finally admitted that the idea of being with a woman attracts me a lot (so does lesbian porn and erotic fiction). The problem is that I just don't develop feelings for someone very fast. I've never been in a relationship and never had sex for that matter. I've had minor crushes but they were always boys, but now I think I might have had them for girls as well but just didn't really realise it at the time, is that even possible? They few times I kissed boys I really enjoyed it and I did kiss a girl once but I was just too drunk to really know how I felt about it honestly.

One part of me wants to tell this to everyone so I can explore my sexuality because I have no idea how I could ever find a woman I like that likes me back while I'm in the closet (internet dating is not really my thing). But another part of me is scared this is just a phase and I don't want to come out if it really is a phase because that way I would be just another confused girl that makes sure no one takes actual bisexuals serious.
Is it possible I just want to be bisexual while I am not? is that a thing?

Hope this makes any sense and someone can help me out a little