Your W wanting to stay married is a huge plus. It's important to have that as a goal. I don't think dating falls into that, but that's me.
I could definitely deal with my H thinking this is a marriage sabbatical, but he doesn't know if he wants a D or not. Actually, more specifically, he doesn't know if he wants to come back to our marriage or not. But he does want to be married and looks forward to being happily married, it's just that what we have doesn't "do it" for him.
A marriage sabbatical. Nice.
Me: 42/H: 37 T: 10 years/M: 8 D9, S8 Bomb: 7.23.07 Separated: 1.20.08 D Final 3.19.09 Affair started in '05, found out parts in 11/07. They married 11.26.09