I wish everyone would be how we want them to be. My daughters father walked out on us too. I was 4 months pregnant when we found out our daughter would be very very sick when she was born, so he ran. He couldn't take the responsibility. I am sorry that he is like that.
I hope one day you will find someone else to take his place, like I did. He may not be the "father" of your children.. But any man can be a father. It takes a great man to be a daddy.