My ex fiance ran out on me with another girl when I was pregnant. My son is starting to ask about dad and I'm not sure what to tell him.

Sorry for spelling mistakes. I come from France and I moved to America for University. I studied Graphic Design and I know work for a fashion company since graduating. I still live in America, I'm a single mother with one child, Léo. He's 2 years old, almost three. I'm 26.I met my ex fiance in College and a little after we got engaged I got pregnant. We decided to have the child and 2 months before he was born he ran off with some woman to Boston. Have not heard a word from him since except the payments for child support. Even then he made it clear he's only doing it so the law can't screw him. He has not see Leo ever.Leo is starting to ask where dad is and I don't know what to tell him. via /r/Parenting http://ift.tt/2lC6pQH