Confused about sexuality

Hi. I'm a young enby has only ever been attracted to other women until recently.

My friend introduced me to his other friends. I developed a small crush one of his friends.

We have talked a lot (he's also going to give me a copy of the quran because I was interested in it) and I felt the fluttery butterfly feeling I only felt around women.

The confusing part is, I've never been attracted to men before. Romantically or sexually. So this situation is really confusing to me.

I could really use some advice in this situation.
Is this normal? Or will this fade?