Don't know if this will help you, but here is how we are handling R while separated.
(pardon me, im new and dont have the hang of the abbreviations yet)
My H and I fell on hard times after selling our house and moved in with my parents 9mos ago. I found out about the A a month ago and kicked him out that morning. I had no intention of taking him back.
We have a 1 1/2 yr old son and agreed that he needed to see both of us as much as possible. We also have unusual schedules and between his work and my school, child care was handled mostly between the two of us.
The next day, I called the OW and found out that the A had really gone on for 2 years! I was devastated because it started when I was 3 mos pregnant. So after hearing this, I was sincerely DONE with him. He had nowhere to go so he moved in with his parents.
Immediately he wanted to R, promising the world, going to IC and wanting to do MC. I had to keep in contact with him for drop offs/ pick ups of our son. So from the beginning, I had to see him about twice a day. Each time he would beg for me to give him another chance.
After 11 days of this, I gave him a list of demands and agreed that we could "date" while living in separate places. I did this because I felt so betrayed, and because our marriage was in the crapper for the last few years and we were both contemplating divorce anyways. I need to be sure that things are really going to get better and stay better before I uproot me and my son into a new place with him.
I told him that if over the course of the next few months I feel like things aren't improving, or if I find out he's lying again about anything, its over. Its also possible through therapy we will see that this wont work and need to go our separate ways.
Anyways...so far so good. I realize that if R is going to have a shot at happening, I need to be in this, working on myself and our relationship as well. So we talk on the phone and during son exchange for at least an hour a day, and have had a couple "dates".
This is working for me because, I have just started to get comfortable having conversations with him and giving him hugs and saying "i love you". In the beginning, I wouldnt let him touch me. So I know I am not ready to live in a house with him or sleep in the same bed. Baby steps.
When we start MC, if the therapist recomends us live together, then I will consider it. But I dont see that happening for another 3-6 months honestly.
It's only been a month and we are a unique situation, but it has been working for us. Of course he wants to be with me and would move in with me now, but I dont want him that close yet. He needs to earn back more trust first, and I need to see that our relationship is moving in a better direction first. I feel that through dating, getting more in touch with ourselves and learning new communication skills, I should eventually WANT to be with him more and WANT to live with him again. If I dont find myself feeling that way after a while, then I guess I will have my answer about what I need to do.