is 16 and 18 a weird age gap?

Tammy
so I've had what I suppose would be termed a 'thing' (though we hate this word) with this guy for about half a year now and it happens to be that he's a couple years older than me. I want to know if this is weird. He is incredibly lovely, and I doubt he would ever have impure intentions, but it'd be good to know some outside opinions. x 
p.s we haven't had sex or anything, and I plan on keeping it that way unless we end up going out