Don't think of July as a deadline. Check out DestinyUnknown's post in the Midlife Crisis thread. She did GAL while her H was overseas and it worked for them. It can work for you too.
Your new diagnosis is a great way for you to understand his perspective and for him to understand that this isn't the real you. Keep SHOWING him the changes. It takes time and patience... There are years of trauma to undo and it can't be done overnight.
Remember progress is progress. He hasn't moved out. You have a whole month to keep showing him the changes. Distract yourself from the negative thoughts so they don't consume you. I put together a LOT of puzzles. keep going to therapy, talk with friends and post here. You will survive this!
When you are happy as an individual, you are in a better position to determine whether a partner enhances your happy life or weighs it down.