H says ready to work on relationship, now what?

[Some Day]

Yesterday, after our phone convo, H and I met in person and discussed this further (see above). He told me he loved me and missed me and didn't want to lose me. He apologized for hurting me. He kept reiterating that he wanted to come home and was willing to give his all to our relationshup.

I once again expressed that I can't tolerate contact w/ OW or his girlfriend. He said he agreed this was detrimental to our marriage and that he would stop it. He told me he had already spoken to his leasing agent and was ready to terminate the lease and move out in mid-January. He talked about the furniture he had acquired and where we could place it in our home. He also mentioned sleeping over once in a while until he terminates the lease.

All these things were brought up by him, not me. A few times I told him that I wanted him to be sure 100% and that it was something he truly wanted. He repeatedly said he was sure of what he wanted. He also said he knew that OW was not the right person for him. That she made his life chaotic and that when he was with her, he felt like he was pretending to be someone he's not (she's in her 20's and quite immature).

A good thing that came about is that H finally shared some of his feelings with me. He felt that my distancing from him made him feel like I didn't really care about him and made him question whether I truly loved him. He said he wanted to feel from me like I truly love and care about him. He shared with me what he liked and disliked about me. He told me he feels loved when we spend quality time together, show physical affection, and I give him words of affirmation. He admitted that he had taken up drinking excessively on weekends to numb the pain and that he knew this was wrong.

Last night, he slept over. Today, we spent most of the day together and we ML. As the day progressed he seemed to become more withdrawn. After dinner, he left to go back to his apartment and spend the night over there. I know that it's better if we move slowly and I give him the space to gradually come back vs. moving in tomorrow, but I must say that I felt sad and hurt that he wanted to go back to his apartment. However, I did not ask him to stay.

This is all new to me and I'm extremely scared. How do I manage this? He wants to come back to our marriage and our home in January. And I told him that he could come back as long as he demonstrated that all contact with the OW is over and I also conveyed that we would need to rebuild our trust. We both agree that we need to go to counseling so we don't repeat the same mistakes.

I'm guessing that I should expect him to be demonstrative one day and withdrawn the next as part of this process, right? I realize he has been out of the home for the past 5 months and it will take a while to make this transition. Thoughts?