My DH is 3 years younger than I am :P We first met when I was 21 and I didn't want to date him LOL But he made me fall in love with him People never really say anything about me looking older, supposedly I look younger anyway. His ex had something to say about it when we first got together though. Hah.
My DH is 3 1/2 years older than me which isn't very much, but we met right before I turned 17 so it was a HUGE deal at the time - especially to my parents. Once he turned 21 and I wasn't close, it was a bit challenging because his friends wanted to go out and I couldn't, but we made it work obviously and were even married for a over a year before I turned 21 (at which point the "small" age difference didn't matter anymore). Sounds silly but when you are underage and your spouse isn't, it's surprising how often the issue comes up. Now almost 10 years later, it's funny to think about.
DH is only 18 months older than me, his best friend and I grew up together, so we had known each other for a long time before we started seeing each other. We had only been together about 3 months and we were engaged, we started dating in April, were engaged in July, and married in June the next year. 12 years later, we're still together!!