3 months pp and fiancè broke up with me

My fiancè broke up with me last week. This is complicated but a big part in this story is 6 years ago I lost my husband and unborn baby in a car accident. I met my fiancè a couple years ago and he and. My late husband do look alike. In the delivery room I kept refusing to him by my late husband's name and yesterday he said he wants to break up. I asked why and he said that he knows that I don't love him. I love the idea of potentially having my late husband back. I asked was it about the hospital and I'm sorry about that and he said it's not just the hospital and for a while he's felt like I've been trying to turn him into my late husband by wanting him to dress like him and be into the same hobbies as my late husband and he realized in that hospital room that i don't love him for him. I cried and begged him not to leave. He said he is still gonna be there for me and our son but he deserves someone who loves him for him. I spoke with my therapist and she asked me some questions. She asked what do I love about my now ex fiancè that isn't a trait my late husband had or I tried to get him to have. When I couldn't come up with anything she said maybe there is some truth in what he's saying. She told me to be honest with my feelings and I said that I feel... Like I lost my late husband twice. Not that I lost my fiancè. And now I feel like a terrible person. I feel like I can learn to love my fiancè for who he is. I don't want to be a single mother. I want my son to grow up in a two parent household. I've tried talking to him about it but he said for right now he rather just talk about the baby, not our relationship. I feel like I've fucked everyone's life up.