@Chocosprinkle early on in your first post you say 'we can talk for hours, we have so much in common'
There's a really interesting phenomenon when we meet other people (of any sex/gender and in any context) where we subconsciously scan similarities and differences. It's how we work out how to connect with other people or whether we should be wary of them and run away!
Put that in a potential 'personal relationship' context and in general we focus on the things that are similar between us, however inconsequential they are. So you get the conversation: "OMG, I can't believe it, Mike doesn't like walnuts, and I don't like walnuts either. It's our most hated food. Can you believe it?? What an amazing coincidence!" All the while ignoring that their personalities, circumstances, long-term plans are entirely incompatible.
And the converse applies. Sometimes people leaving relationships put massive weight on the perceived differences. Couples who have been together for eons, have stable lives, kids... and suddenly split up because he/she had was vegan, or apolitical or didn't share their passion for exercise...
However I would say it is good that you can feel this excited and intoxicated by something new. Take hope from that. What can you imagine that you and dh would do that might be similarly exciting for you? When dh and I were 50 we found 50 new things to do together. Some were mundane - dinner in a longed for restaurant - one was about having sex outside, which somehow we'd never done before! Some were things together - learning to play a duet. One was life threatening (accidentally) when we both nearly drowned - God, HE was the person I wanted to be with at the end of that experience!
So, OP, I wonder what this distraction is telling YOU? (for it is only a distraction, it's not a life-meant love). What is it telling your inner self? Is it telling you that you still have capacity for excitement - and how can you find that? Is it telling you that you want sex to be more exciting - well be imaginative about how you can find that!!
Also, in the very immediate short term, use CBT/hypnotic techniques to create an aversion to the 'lovely man'. He is not so lovely if he is vomitting after a night out or because of noro virus. He is not so lovely when he's eaten something that's disagreed with his digestion...