DU, It's understandable to be sad and upset about this, but you need to read the attachment and then provide it to your lawyer. If you do not agree w/what is in the attachment, advise your lawyer of your thoughts. Allow him/her to negotiate the SA...do not get into it w/your h.
You can only stall a divorce and/or SA so long....if a lawyer is involved, it will eat up all of your funds before you know it. You may have to end up going through w/the divorce and hopefully at some point, he will wake up and realize that you are the one he truly wants to spend the rest of h is life with. I know that this isn't what you want, but unlike marriage, which takes the decision of two people to do it; divorce is totally different, especially if one is hell bent on getting one. I'm so very sorry he's pushing this.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.