houston, we have a problem

okay, a few months ago I started dating will. I met him through his friend who told me that will was age 27. perfect, i thought albeit a little young, but why not, what's to lose? when I told people he's 27 they would say "well at least he's not 25" So off we went, and now we're still dating. Last night i learned he is in fact not 27, he's not even 26 HE IS IN FACT 25 AND I'M HAVING A COMPLETE AND UTTER MELTDOWN AND NOW NEED TO BREAK UP WITH HIM SINCE HE'S NO WHERE NEAER THE SAME LIFE STAGE I'M IN!!!!!! PLEASE ADVISE!