Hi ganb8te, I wish I could give you some good advice! I don't know!
What a sh!tty situation.
So you went casual and invited him for a drink. Did he just say no, or did he say he was busy or what?
I feel like pushing R talk at this point will not be a good idea unless you are really ready for closure. Since you just met with him a few weeks ago and he wasn't ready to make a move I think it needs a bit more time. Maybe just a few weeks.
Any vets want to step in with some wisdom?
I think pursuing is not a good idea but I see what you mean about him avoiding.