It appears at first blush, that your H is giving you some very classic "script" and that he thinks this is all about him, even though he claims to be thinking about you as far as what he might say is giving you a fair buyout.
As many who find themselves here, you will be all over the map emotionally at these early stages. That will be the first thing to get a handle on. Work on detaching to help you stabalize your emotions so that you can act in positive, effective ways, rather than re-acting to your H's words and actions.
Also, as much as your friends want to help you, leaning on them or allowing them to support you will be very biased. They will want you to be happy and could possibly tell you all sorts of things and try to encourage you to get out and mingle and even try to hook you up with other men to help you out. They will certainly mean well, but they can also derail your efforts to work on yourself and hopefully save your M.
If you can, keep as much of your venting and thoughts here, with an IC, possibly a DB coach, or a priest who will be pro M and DB friendly and help you work through this.
As I mentioned, others will be around to support you. Those are just some things I wanted to bring up right now.
Detach, GAL, work on your 180s. All important to move yourself forward and possibly help save your M. As far as D, get advice from a L and take your time to conduct due diligence before agreeing to anything. It's what HE wants and he may not even follow through. It is not for you to stop him from getting what he wants, but you certainly don't have to rush or give him what he wants, or do the D work for him. There's procedures and processes for these things.