I'm widowed. I dated a variety of men in widow-hood,most of them only once.
The easiest let-down I ever heard was from a man who had asked if I had worked through my grieving and asked if I was emotionally available for a relationship.
I don't know if it was an excuse or not, but we spoke after the date. He said, "You know when I asked if you were emotionally available for a new relationship ? Well, I realized *I'm* not."
You've been out of your marriage only eight months. (yeah, I'm aware that you'd been thinking about it a long time. Humor me.) This is the perfect thing to say to someone who wants a commitment from you but "may very well disappear. " From the outside looking in, his attitude toward this is hogwash, and I'm cleaning up the language here for the audience.