What should you tell this guy that you think really likes you and you can't stop thinking about him but he's too embarrassed to tell anyone and won't admit it since I'm 2 years younger than him?
You should tell him that you are aware of his feelings for
you and if he really likes you then he should just embrace it and
not worry about what other people think because he can never know
if your the one for him and if he just ignores his feelings because
his friends might make fun of him then he could miss out on the
love of his life.