Okay, I'll try to make a long story short...
I met a man at work and we became friends. Quite quickly afterwards we began a sexual relationship. I was 22 and he was 30. He told me that he was infertile and I believed him, and so we never used condoms other than the first time we slept together. I'm not on BC either and didn't think I needed to be because I trusted him (I know now how horribly naive this was...)
I've also had a history of eating disorders which sometimes led me to skip periods which made me wonder if I myself could be infertile. Combine all this together and we didn't practice safe sex. He told me that he had another FWB that lived in a different country and he and her would meet up and have sex also. I'm ashamed to say that even when he told me this I didn't enforce safe sex. I wouldn't make these decisions now but unfortunately, I did at the time.
After around three months of us sleeping together (never in a relationship by the way - it was always casual), I became pregnant. I told him and he accused me of sleeping with others and said it couldn't be his because he was infertile.
I was so confused by this because I had not slept with any other man. At some point through the pregnancy he came around to the idea of being in the baby's life and said he would be there for me and end things with his FWBs. Then he disappeared again saying he would be an absolutely awful father, never loved me and never wanted to be in a serious relationship with me and would just mess the child up.
When our daughter was born I used something of his to send off for a DNA test. There it was. He was the father. He couldn't refute it. I sent him the paperwork and he ignored me. Then I went to his house with my daughter. He absolutely fell in love with her after I saw her, like I can't explain it. He said that I became a mum when I fell pregnant but for him it happened when he saw his daughter for real.
Now he wants to be with us, wants us to live together.
I am so traumatised and scarred from the way he treated me, the lying about being infertile, the flipflopping in and out of my life and I am terrified he will do this again, but yet he has been adamant for the past few months that he wants to be with me and be a family.
My parents tell me to tread cautiously. I really want my daughter to have her dad, but am terrified that he will let us down again.
I know I've been naive but going forward I just want to do the best for my daughter. Any advice?