When you get above 17/18 years old I doubt a year or two between ages makes much difference.
Certainly when you get to my age, I don't even notice a year or two in age difference, not even 3 or 4 or more years really.
There is currently someone who I've taken a liking to who is all of two years younger than me. And few months back there was a girl who I would have said was probably 3 years older than me.
Nothing has come out of any of this, but i were to have I don't think age would have been an issue. Not to me any way as I never really considered their ages to be majorly different from my own before I found them out.