Affiliate Marketing Secrets

I moved to a new school about 8 months ago and everything’s been going fairly well. I’ve found my niche but all of a sudden this guy has been indirectly coming on to me. (This has been going on since December.) He is continuously flirting with me in an awkwardly cute way. It’s weird because he goes out of his way to make me notice him in class but won’t actually talk to me (except twice). BUT, he has an on again/off again girlfriend and I am 100% not interested in getting involved in that.
The question is, do you think he’s just trying to mess with me/make a fool out of me? I’m not a social pariah, but I’m definitely not in the “popular group” like himself. Everyone in my town knows/loves him.
I am *NOT* going to pursue him since he has a girlfriend, but if they break up and he continues flirting with me like he is, what should I do?
He acts really awkward/bashful when he’s near me, but around his friends, he acts very arrogant and sure of himself. Do you think he’s just trying to mess with me?
We’re both high school juniors.