Do you think it is wrong for a 17 year old girl to want to hang out with a 20 year guy?

do you think it is wrong for a 17 year old girl to want to hang out with a 20 year guy? im turning 18 in two months. i started talking to a guy that is 20 he is a really sweet guy. he was willing to move his stuff around to see me on my uncles time (i live with my uncle). my uncle changed his mind 5 times before saying no he is to old! so is it so wrong?