Oh mimi, your situation is similar to mine. My H did your steps 1,2, and 3 and then told me he was in love with a woman he met in the online gaming world. He started pulling away and saying he was depressed in October. Looking at phone records, I learned that was when he met his OOW. Everyone here will tell you that you are at the very beginning and it could be years if ever before he comes out of it. I don't know if my H is really in MLC or just a WAS, but does it matter? You need to decide if you want to try to wait, and then your actions are the same in either case.
I don't know how long I can wait things out either and I am still near the beginning too. Everyone tells me to kick him to the curb and get a divorce but then I remember that he was my best friend for 23 years and how much I want him back. I see a counselor tomorrow, so maybe she can help me start to figure out what I really want to do. I think if I am not sure what to do, I should do nothing.
Me45 H45 D13 S10 together-23 years married-21 years MLC Divorced 10/3/07 Married to a wonderful new man.