Baby dad

Sooo I’m due in February with my first child. I’ve told a very select few family and friends. I’m still contemplating the idea of being pregnant it doesn’t seem real yet. My emotions are still all over the place. But I never excepted to have a child this way. I’ve always wanted a child but wanted a family too. When this guy I had been seeing, we weren’t officially together but spent so much time with our families and with each other that I kinda assumed we were together, especially the way we talked about life together. Anyway after he left me I started sleeping with an ex as a rebound and 1 other guy whenever he was in town. I’m 99.9% sure this baby is my ex’s child. He blew me off several times to talk about this situation but I recently found out he moved states. He has 2 children already. I messaged his ex that he had kids with and she seems really chill about the situation. But him on the other hand is in denial of it. I just feel terrible like I got to do this on my own and I’m pretty sure my child will never know it’s father. I’m hurt so bad because I couldn’t imagine my life not knowing my dad. My heart hurts and I don’t know what to do with this situation but I know I have an amazing support system. And my dad is sooooooooo beyond excited to be a papa, which makes me a little more excited to have this baby. (my dad already has one grandson but never gets to see him cause my sister cut us out of her life due to stupid drama). I just never imagined my life and “family” to happen like this.