Hi na- You are where so many of us here long to be. Your H is willing to do the work on himself and the M. When those fears pop into your head, remind yourself of that...and at the same time try to remember that IF that MLC alien were ever to reappear, you know you will survive. Focus on that good feeling you have when you and your H are together and try to carry that with you when you aren't together.
Count your blessings everyday...for you are in a good place and hopefully with time (and work) it will just get better.