i need help.

so. This boy and i were on and off for about two years. my friends and i prank called him yesterday. my friend, maisie, was talking with him for about 10 minutes, within the first 3 minutes, he knew it was me my friend said... "dont you live in ****" he then says "no i moved to ****" (WHERE I LIVE!!!!!). then blah blah blah random conversations go on and then maisie asks the boy- lets call him... Jacob. "Are you with anyone at the moment" HE THENNNN SAYS "yes Charlie Tang" - MEEEE!!!!!! As soon as he says this i jump to stalk his instagram on my friends phone. it then catches my eye. he. has. a. boyfriend. -who looks bout 5 btw. We are 18. What do i do??? i need him back.