You seem to wonder if he's blowing you off or actually thinking things out. Could ask him something like....
"Could you be willing to talk to me more openly about what it is you need to figure out and what you have discovered so far in your thought process at this point in time? How about _____time/date____?
Could that work for you? I don't want to rush you, but at the same time I don't want to be in the dark forever."
Both could determine what open relationship models
you each are up for.
And which one of those you are going to try to build together at this time.