Hello, I apologize in advice if this is in the wrong area or I screw something up... first time posting. 

I met this girl in high school freshman year. We talked a few times in class. I got her number and we talked a bit. We were both in to gaming and had some fun times with that. She had a boyfriend. I had so much fun hanging out with her I didn't care I just wanted to be friends because we would always smile when we hung out.

The last time we hung out we had fun. We talked and played games and laughed. Then I didn't hear from her for a long time. I tried texting once in awhile. She text me back and we had a short chat... but other than that we never hung out again and I haven't seen or heard from her since.

What went wrong? Why couldn't we be friends? More to the point. Why can I not stop thinking about her. She clearly doesn't care about me. Why should I? I go over it my head over and over. I think to myself "She had a boyfriend it wouldn't have worked out". I know that. I don't understand. Is there something wrong with my head or something? Help please.
user
I met a girl in school, we had fun. We got along well. She had
assistant
Hello, I apologize in advice if this is in the wrong area or I screw something up... first time posting. 

I met this girl in high school freshman year. We talked a few times in class. I got her number and we talked a bit. We were both in to gaming and had some fun times with that. She had a boyfriend. I had so much fun hanging out with her I didn't care I just wanted to be friends because we would always smile when we hung out.

The last time we hung out we had fun. We talked and played games and laughed. Then I didn't hear from her for a long time. I tried texting once in awhile. She text me back and we had a short chat... but other than that we never hung out again and I haven't seen or heard from her since.

What went wrong? Why couldn't we be friends? More to the point. Why can I not stop thinking about her. She clearly doesn't care about me. Why should I? I go over it my head over and over. I think to myself "She had a boyfriend it wouldn't have worked out". I know that. I don't understand. Is there something wrong with my head or something? Help please.
user
I like a girl and we have fun. She has a bf. We talk but
assistant