How to get a guy who's in his own world

I've been crushing on this guy's since Freshman year. Everyone only really knows him as headphones including the teachers because he wears these big hot pink headphones. He doesn't really talk. See he used to get in trouble with all the teachers for wearing his headphones. I remember freshman year he was always getting sent to the office because he wouldn't take off his headphones. Now I'm one of the few people who know his real name but for the sake of the story we will still call him Headphones. Well ig after freshman year the school have up so they don't bug him about them anymore. Literally during role call the teachers will say sarcastically "Headphones!" And he will Raise his hand. So everyone calls him headphones. I know he's listening to something when they are plugged into his phone which is ALL the time except for class. He just chooses to keep wearing them. Headphones usually eats by himself and is always reading. He had a new book every week. People think Headphones is a little strange because if the silence and the headphones but also he will do things like count in french while he's bored. Thats the closet you hear to him talking. Headphones is in his own little world and senior year may be my last chance to make a move! How can I?

Edit: What are sensory issues?