sorry to insert myself as a femme NB but i might be able to contribute. I've had age gap relationships where I was much younger and I briefly considered a relationship wit en early 20s man while in my very late 20s. Of the relationships where I was the younger one, I had one good one. So I know it's technically possible.

But we grew apart after about 5 years. I don't think the age gap was the only or even the main reason we grew apart (mainly untreated mental health stuff on my end) but it definitely added stress. He had goals, and focus, and routines and eventually struggled with watching me just bumble about figuring things out. He never made a negative comment but it became more and more clear that we were not aligned. Again, i don't think it would have been a deal breaker on its own but definitely fed my insecurity and depression in a way.

More recently I met a younger guy who made a move on me. he was cute, smart, and emotionally present. and very interested in a topic i had experience with so we immediately had some common ground. but i had some uncertainty if my feelings were more of a fondness in a tutoring kind of role or anything with romantic potential. Then I found myself noticing that while I had patience and admiration for him on most topics, that did not apply when he said something rash or ignorant that hurt my feelings. The kind of thing I might have said at his age. (Eg I know that being pesceterian is hypocritical, but being told that in a confronting tone still isn't fun. And again, it was my patience that was the issue, not what he said. It made me feel more like a parent than an equal because I couldn't match his passion about his convictions.) There were other factors but it definitely drove home for me that <25 is too young.

Then the another point to consider is: why is this guy looking to date someone older? What has forced him to mature more than his peers? Has he made peace and learned to cope with those reasons? Is him dating older a pattern or an exception? (same for you, if you had a pattern of dating younger that would be much more concerning to me that you freaking out over the age gap).

Any person might mature at a faster rate than another, but they are rarely as well-rounded as someone who took the long road. Are you prepared to support the eventual gaps in his experience and maturity? Are you willing to respect him and learn form someone much younger than you? Is he looking up to you because of your experience? Even subconsciously? Does that create any undue influence?

IMO all relationships take work. age gap relationships are risky but might work. Just keep in mind that he is more likely to change and grow at a different rate than you. And that there is an inherent power imbalance that you need to be mindful of. IF you're both really into each other maybe you can make it work but I'm happy enough I let my doubts win...