I am really sorry to hear you are going through this. That would be traumatic to experience. A man like this sounds like he is simply trying to shirk his responsibilities. I really think when a man runs away it's because he knows it is time to be serious and he does not have the love in his heart towards the woman to take it to the next step. You are likely a great person, and his decision is not a reflection on you. I do not think this man is likely to come back. Sometimes men come back into their children's lives, but it is often years later, after age and time have given them a lot more wisdom.