Do boys easily forget their crush?

I'm a student and 2 years ago I've noticed a guy who was always looking at me really staring at me, he was also sitting next to me and that lasted all the year long. At time, it's seems like ha was trying to start a conversation but he never did. Last year we weren't together in class anymore. We only saw each other at the library twice. The last time we saw each other, he came sitting next to me like he did before and he was staring at me. I was unable to make any eye contact because he would turn his head. Now it's a new year at the university and I try to make him notice me. I always seat or pass in front of is class room so he can see me but usually he doesn't see me because of the crowd or it seems like he sees me but he doesn't want to make any eye contact with me anymore. It seems like he doesn't care about me anymore and that's really frustrating because I developed a huge crush on him .That makes me really sad. My friends tell me that he doesn't like me and never liked me because he didn't make any move. One day it's seems like he likes me and the other day he ignores me! I don't understand boys
Do boys easily forget their crush?
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