It takes a minute to fall for someone and a whole heck of a lot longer to fall out of love with them.
When your heart is in it, it hurts! Believe me. Mine was all in it, and I still have feelings that I am dealing with.
It hurts, pain is not fun. If you don't mind me asking, is this man who you have your son with? Is he your first love? What are the circumstances that make you say "no chance ever?"