Of course I've been in a position of having had the initial rush, then realise a man has gone quiet on me.
I'm a similar age to you.
Yeah, it hurts.
Last happened to me in 2013 - actually, it was almost exactly 2 years ago.
Went from daily texts to 3 days of nothing, even after I asked a direct question about meeting that weekend. He did have a LOT on that week, but still: daily to nothing, and it takes seconds to text.
Did I play games? Going quiet on him in return?
No. I texted "hey, you've gone from texting every day to disappearing on me - that's never a good sign - I guess you don't want to take this any further?"
Reply "I'm sorry, I don't have time right now and it's not fair on either of us, you're right, I can't commit to a relationship and give you what you deserve. You're great, it's not the right time for me"
All flannel if course
he just wasn't that into me.
But better to just get it out there than faff about being quiet on him back and getting upset.
Frankly, "no way us he dumping me" is for a 14yo not a 40yo.
If you're not happy with how you're feeling, TALK to him.
Anything other than just talking about it is playing games.