I can't move on from a guy I haven't even talked too, something about him makes me think about him, we go to same sport. PLEASE help me out?

hard to explain but this guy and me go to judo at the same club, i started not long ago and he competes more often so we both train differents locations. When i had my first tournament, somehow i saw him going across the hall and watching my match where i lost. next match i saw him notice looking at me when i was competing because we have camera for live streaming and i zoomed on him and he was spectating my match. next match at the same day, he sat at the judges table to watch my match which i thought was weird because he was competing too but his matches were done. the club trust him a lot, so i did not care but why did he chose my mat to judge there was a another matcht going on too (guys -57kg) anyway, something about him is that i can't move on, i found his Instagram so i was looking into his page but i had to block because i should not like him because we go to the same club and if we broke up and if i ended up in his training location because i do train there sometimes its going to be awkward. What does this mean? how do i move on?

I can't move on from a guy I haven't even talked too, something about him makes me think about him, we go to same sport. PLEASE help me out?
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