I used to think i was heterosexual, but I do find that I am attracted to some guys now as well so I am bisexual?
(I am still a teenager so I am not sure, maybe it's a phase?)
Sexuality, preferences, and gender are all subject to change. Some people are 100% secure, but that is extremely rare, especially if you're a teenager and young adult.
So that's not strange at all.
I've gone from:
Thinking I was asexual (although I doubted this, but I didn't really seem to really be attracted to anyone, whcih seemed to be 'normal' for others) to thinking I was transgender, then heterosexual with curiosity for bisexuality (in that time if I could have hooked up with the same gender, I might be able to say for sure, but I couldn't), then I settled on pansexuality and demisexuality.
And sometimes I experienced a mix of this a few times too, changing it all around. I was certain I was not gay, however.
Anyways, settling on being a demi+pansexual... That's only been in the last... few years, and it's stuck around ever since. So only now I can say for sure, or at least with a lot more certainty than years ago that I am exactly that.
But labels shouldn't matter regardless. You are who you are.
I found out it's not what a person looks like. They can be male, female, or anything in between or none of these (yes, physically this is possible), but I don't care about that.
I care about the person, their behaviour, acts, etc.
Sure, I have preferences. Everyone does (certain body build, hair colour, etc.), it's something natural. But I really couldn't be together with someone who I cannot have an emotional, mental bond with and grow over time.