How do I get out of loving the "other man" when I'm a married woman?

4 years ago I became colleagues with a man I met online. He knew I was married from the beginning and he was always platonic with me, or so I thought,

Things soon started getting weird between us and he started acting jealous whenever I'd mention/have a conversation with other men. Then there was sexual innuendo and tension, and his constant jealousy so I ended up confronting him about it and he immediately severed our friendship, blocking me on all online platforms. I tried to reconcile through email, apologizing and trying make amends.

He completely ignored all my requests making it clear under no uncertain terms he did not want to speak to me ever again. I accepted it and I decidedly moved on.3 years later he emails me out of the blue all of the sudden asking "how I'm doing." I was shocked. I never expected to ever hear from him ever again, things ended that badly between us. I figured I'd hear from my dead grandmother first before I'd ever hear a peep from him.And two weeks ago we had phone sex. I confessed to him that I loved him and he told me he wanted me to leave my husband and come live with him and he wants to get me pregnant.