Do you think this is bad?!

I went away on vacation to England nearly 5 months ago, ended up meeting this guy through mutual friends. We got along so well and decided to stay in touch. Since May, I have been back to visit him once and he has been here to visit me twice (I am from British Columbia by the way)

He officially asked me out and asked me to be his girlfriend about 3.5 months ago. I said yes! We get along so well. I'm really happy and so is he!

He is tall and very mature. And for the first time like a week ago, I recalled the year he was born in.

I forgot that he was younger than me. Just because he's easily 6-7 inches taller than me and wiser than his years.

I'm 22 dating a 19 year old. We have decided to not sleep together yet just because. But still. I'm like holy I forgot how young you are! I mean it is legal. But I just all of a sudden feel weird about it. I mean is this ok? I mean it's only 3 years. Not even. He is 20 in January.

But I'm curious as to what others think about that? I mean if you looked at him you would think hes 28 haha