Should I let my ex-husband see our daughter?

Background: We were together for almost 9 years, married, both mid 30s, stable jobs and good financial situation. We both agreed on having a child and getting a dog (not at the same time). Fast forward to when said events actually happened, my ex had an affair and posted on reddit that "he has a wife he doesn't love and a baby he didn't want". He proceeded to blame me for everything - having a kid, having a dog, moving back to my home town, which he apparently despises. This was all happening while baby was 8 months old and I was doing my post graduate degree as we had both agreed on. Our marriage dissolved within a couple weeks and everything dropped like a bomb on my head it happened so fast. We ended up agreeing on a separation agreement and he handily signed over custody to me when I asked (as a test to see if he truly did not care for our daughter). So thankfully, I have full custody but he also blames me for this when I say that how easily he signed her over is just a testament to how little he cares about her. He then proceeded to move across the country and telling a mutual friend that since I don't let him see her he might as well move.Now, he emails saying he has always cared about our daughter and loves her. He says that he wants me to help him and her skype regularly while he's across the country. He says he's finalized a move back to where we are (originally supposed to be for August now pushed back to October for unknown reasons - his convenience?). He says he wants to have a relationship with her.One of the best silver linings throughout all of this is that my kiddo was way too young to remember anything at 8 months old. I fear that if I let him form a relationship with her, he's going to disappear again, choose another woman over her, choose his career over her or really just whatever is convenient for him. This time, she'll remember and she will hurt. I also fear that I would have to deal with a step mom and yes, it would make me super jealous if she had a better relationship with her father or step mom (if there is one) because I went through hell and back to get us to where we are today - in a really good place. However, I also understand that I should not be the one to decide this for her and I certainly don't want her to resent me for the decisions I make today.What would you guys do? Would you let your daughter see this man? Sigh, this shit keeps me up at night. via /r/Parenting https://ift.tt/3iDis1y