My crush enters the room and sits right behind me. What does this mean?

Ok this is probably going to sound really stupid and I don't blame you for thinking oh another desperate girl on this site but I just really want to know if this means anything; so I'm in the library on my spare with a friend and this guy I have a crush on is there too, an announcement calls all grade 12's to the gym for a grade photo so some people get up and head to the gym including my friend and I and him. We get in the gym and sit on the bleachers and there are only like ten people there so there is a lot of room, my crush enters the room and sits right behind me ( I should point out that he is a very quiet and serious guy who likes to be alone and I have never seen him talking to anyone else ever, he's always by himself) so I'm a little shocked because I thought he would like to sit at the end alone. Does this mean anything or am I just getting excited for no reason?
My crush enters the room and sits right behind me. What does this mean?
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