Husband wants a divorce over something that happened 5 years ago

Me and my husband have a 9 month old baby and he just told me today he wants a divorce. I asked why and he said he realized after finally seeing a therapist that he's not in love with me anymore and he hasn't been in love with me since something that happened 5 years ago. 5 years ago I did something I'm not proud of. We were newly married. I wanted to try something new and in the end I got carried away and crossed some lines. It was sexual assault and I acknowledge that. I have apologized. I never let myself get carried away like that again and he forgave me. He told me he realizes now that he only forgave me because of his bad attachment issues. Since he was abused as a child all he wanted was to not be alone. And he's always gotten easily attached to people and how it may just be an autism thing for him but he realizes he is only still with me because he's trauma bonded and is afraid of being alone and what happened is when the love in our marriage ended. I have been asking for marriage counseling and he said he's made up his mind. I literally go back to work next week (I'm a doctor) and am now getting divorced. I keep begging for marriage counseling but he says he can't. I never did anything like that again. I never meant to hurt him and it was 5 years ago. I'm broken 💔. My mom is more worried about me money wise because my husband is a para part time and I clearly make a lot more and she said I should be worried about alimony. My whole world is falling apart and I'm 9 months postpartum.