I think if you get along and laugh and have a lot in common, age doesn't matter. When I was working a few months ago, we were all sitting in the lounge during lunch talking. I'm 35 and there was a man about 60ish teasing one of our newer guys, who was 18. Just
turned 18. For some reason he made mention of his age, and how his mom was just a little older than me

. I was like "WAIT...you could be my SON???...and last year you carried a back pack to school???" We all just sat there silent. Age was never something we thought of when we all hung out at work. We just all got along and had a great time with each other. Realizing our age differences was like ice water in my face! This of course was a friend relationship, but it's the same premise. If you get along, it shouldn't matter.
And my husband is almost 6 years older than me. It has never bothered us at all. The only thing is I'm ALWAYS the youngest whenever we go out with friends, and I look younger than I am, so it's even worse. My husband frequently gets asked if I am his wife, girlfriend or daughter...

Thaaaaaat's awkward.