New tread and already so many posts! Great to see how we're all here for each other.
I agree with what everyone has said. I think the progress you have experienced is really fast, so this is why you must be cautious and take things slowly.
After my H's A was over, I thought I had gotten rid of the anger--for a day. Then it would come back two or threefold. Affairs are the hardest things to overcome in a M. I read it takes an average of three years to heal, and that's when the cheating S actually wants to save the M and says they would do whatever it takes to redeem themselves. So, you're not dealing with an easy sitch. The fear about working things out is normal. I experienced it too. When I felt my H was being nicer and that he wanted to get closer to me, a small voice in my head would tell me to stay away. I was afraid of going through the same pain again. So this is a risk you'll have to take. No need to decide on that yet. Keep doing what you're doing, and see small, positive changes happening.
I do think your M does have a good chance to be saved.