Does She Like Me Or Do I Imagine?

Hello! I'm going to ask you for some advice, because I can't take it anymore. I will not mention where I am from or names I will just say that I am 16. So the following incident happened almost 2 weeks ago. I live in a small town and we all know each other. Basically, there is a girl I like for a long time, but I thought she would never pay attention to me. I was at a disco and the girl in question was constantly looking at me and approaching me to dance and so on. It was very cool, but I thought it was just a coincidence. Last week I noticed that he was looking at me on the streets as we passed each other. It is also constantly filmed and sent to snaps, and before it was filmed only on a black screen. A few days ago we were walking down the street and she was walking with her company on the other side, but in the opposite direction. We looked at each other and because I speak louder and she obviously heard, that I want to go to the store and I heard him start shouting at his girlfriends come to the store. We looked at each other again in the store and she smiled at me, and I died of pleasure. I don't know if I imagine that she's something to me just because I like her very much. So I would like some advice on what to do. I go out with the thought of seeing her somewhere.