There can still be a significant difference between 27 and 44, but that all depends on the two people. At 27, many people are still settling into life - progressing in their careers, figuring out where they'd like to live, exploring life.
Some 44 year olds do this to, obviously, but generally they've got a bit more life experience.
Things to think about - if you were together a long time, you could end up caring for a partner who died years before you. He could be looking for a mid-life crisis fling.
Or...you could really hit it off and be happy. Your original question didn't mention if you had feelings for him, and now I'm afraid to assume!!
If you do, then the smartest advice I can offer is to listen to all the little voices in your head..and the ones in your heart. Don't ignore them, and you'll probably see that you've already got the answer inside of you.
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