What should i do about my age/love problem?

Hey guys ! im nicole (16) and im falling in love with someone who is 21, (bruce) he also feels the same about me but one problem..
3 years ago i dated someone (Russ 18 at the time) and through him i met a bunch of his friends. russ had me lie about my age and say i was 16 when i was really only a few years younger. i hit it off with his friends and we all stayed in contact even after our break up.
i just started hanging out with them all again and i met someone new (bruce)(21). at that instant i new we would become something i could never let go
i could not break the lie now its too late! so i told him i was 18 and i didnt no i would soon fall for him the way i did. i am only 16 and i dont want him to give up on me now because i no how much we can be!!! i hate myself for this but i am so lost on what to do! we are both good people and i feel like age shouldnt matter! i am also very mature for my age.
help me with this one please .