Is it possible for feelings to change?

[Buring]

Hello everyone!
My god, i've gone through something very confusion.
At this point, I am now uncertain if I am 100% gay or not...
This one girl recently came into my life, and when I am around her it's like I am fucking flying with warm fuzzy thoughts.
I came out to some of my friends, and family a few weeks ago and everything, but I made it clear maybe it was only because I never had experience with a actual female, and before when I thought about girls..I got somewhat weird feeling and just felt uncomfortable around them.

Now though, this girl came into my life and we've hung out few times now, and she's really amazing!
It feels almost like it was meant to be, the problem is now I feel like a big liar....Maybe I honestly was confused?
Maybe I am bisexual and have physical attractions to men...I don't know anymore! I need some awesome advice please!

Or opinions.