I met a younger guy a good 13 years ago now. We worked together, he was nothing spectacular, not memorable, just someone I'd see around the office. He used to come and go early, never hung out in the vicinity, so rather dull all round
I was asked to organise some work drinks for my division one Christmas, and he turned up. Kept me in drinks all night and we had a really good chat, didn't seem like there were 100 staff around us in the same venue. We were at a few events together over the next 6mths with our contact slowly increasing and he had all the things I would admire in a partner other than being older and my physical type. But time, kindness, his comedy, all the things that internally made him him, made him more attractive every day. Within 6 mths we were dating. Another 8mths in we were expecting our first child. Moved in together with his mum just before DS was born, moved out on our own when expecting DS2. Rented for a couple of years before buying our own house together. Got married last year and still living the dream.
Meet the guy, spend some time with him. See if that connection grows or whether you just have a really good friends with values you can't pass up. My husband is my bestie and when I look back, I can't believe how I could hace easily let him go by and continued picking wrong'uns. 'My type' wasn't my type at all. He was the one all along and were still very much in love and kookie together.
If, however, you get a monthly or two down the line and your cringing when you kiss him, can't see yourself jumping into bed with him. Tell him you dont see a developing romantic connection but you'd like [insert type of relationship here].