Dr. Pollack says that the "code" that goes along with being a boy includes traits such as being macho and never weak. Instead of repressing his sad feelings, though, you can encourage your son to express his emotions in a healthy way.
Give your son time for undivided attention and listening space.
Don't prematurely push him to be independent.
Let him know that "real" boys and men do cry and speak.
Express your love as openly as you would to a girl.