Hi.
I do think you're putting too much emphasis on his age. We all seem to try to "categorize" people into boxes to give us a relative guidline for future reference. Nothing at all wrong with that if you don't mind the possability of passing-up that fella that might be a fantastic match for you. I'm sure you know that every man is different, they only seem the same. Sometimes I feel the same way about women. I believe that's because we train ourselves to see certain quirks about people that we're dating, and try to anticipate what they may, or may not do, in order to protect our own hearts.
But I digress... back to the issue...
I've known men 22 years older than their significant other who've been married for years... I've known women who're 18 years older than their husbands, and have never felt more complete <-- their words, not mine. likewise, I've known mates who were the same age, and couldn't make a go of it. Doesn't have to do with age.. I think it has to do with the person. Either they're a match.. or they aren't.
Unfortunately sometimes it just takes time to get to the bottom of who they are, and to see the real them.
Typically, guys don't even know themselves until they've reached their 50's, and that, only after they've gone through that 2nd boyhood... midlife crisis thing... But sometimes you find em as confident and secure as a mature man as young as 22... keep looking, but keep your mind open.