JZ, just validate, DO NOT share your feelings, he doesn't care what your feelings are right now, his actions have shown that. Say Something like,
I understand that your unhappy and you want X, that is not what I want at this time, but I understand that is what you want.
I wouldn't bring up alternatives, he knows what his options are, he's done nothing but think about them for the last few weeks. Try and be strong, you want to seem like your ok with whatever he wants to do, if you breakdown it will reinforce why he wants it.
Don't mention EA, again he doesn't care what you think about it.
And finally, WHAT? You've been talking to someone? Like dating? If your talking about here, no don't mention any type of counseling or advice you've received. If you've been talking personally to someone, don't tell him but let us know.
M - 9 1/2 years 5/5/16 - Bomb drop - 3 week EA 10/31/16 - We sold house 01/10/18 - D Finalized