How do I know if we are together?

i'm in high school and I've been somewhat friends with ths girl for about 2 years now. I've always known there could be something there, but it wasn't until recently that I decided to make a move. I went to dinner with her and her friends, than to movie, then I asked her to lunch where we spent 3 hours talking. I've picked her up on all these events and her mom and friends know about me. I'm quite sure we are not in the friend zone.

I don't know if we should go on more dates before we start thinking about having a relationship or I should adress it to her, or ask one of her friends what is direction she wants to go in. Maybe she thinks I have to kiss her before she considers us togther. I don't know, what approach should I take.