Could this relationship work this time?

I met "Mike" 13 years ago and we really connected. Two months into seeing each other he informs me he had lost his wife to cancer. I was there for him as best I could to heal, we hung out and talked almost every night. I soon found out that he had only lost his wife 3 weeks before I met him (found the obituary). We continued our intimate "friendship" for a year and a half. I fell in love with him but never told him or showed that I wanted a commitment. He then calls me and says he met someone and if we could just be platonic friends. I was heartbroken but still never said a word about my feelings. Two years later we got in contact and had a 2 month fling (he was now married to her), but I began to have feelings for him again and I ended it. Eight yrs pass ...Im married...but still never truly let him go. After all these years I wondered where life took him, I was unhappy in my own marriage and wished I could have him as a friend again. Then last year he found me on Facebook and we met up. No intimacy, but he was still married. Two months after reconnecting He lost his father to cancer and the day he buried him, his wife felt she had enough of his daughter from his 1st wife and asked him to make a choice between her or his daughter, so he did....they separated, and things got deeper between us. We know what we feel about each other, and feel we were never honest about how we really felt when we first met. We are intimate now and have an amazing friendship and we don't always get together for sex. I am a different person now and he knows I fell in love with him again, and I told him I know he needs time from his divorce to be able to commit himself again just as I did with my divorce. I informed him he should seek counseling since he was emotionally abused in his marriage. He began his treatment last week and deeply relies on me for support. The thing is...is that I am more than willing to give this man the time to know himself again, but am I depriving myself of being with someone ready now for a true relationship? Mike may not be ready for years. Is it time to walk away? I have told him when u love someone u can't just be their friend . I would have to walk away completely. He said he can't lose me again. So confused. Stay or let go?