When he sees you smiling, having fun, and being happy, he will naturally want to be a part of your happy life.
And when you do that, he will be compelled to always think of you, crave having you by his side, and to think of all the ways he can please you, cherish you and adore you.
This is called the reverse psychology of likeability, also known as the Ben Franklin effect.
He feels good about you when you do things you are passionate about.
He feels good about you when he sees you fully enjoying life.
As a result, women often try to reconnect with their man by constantly texting him, calling him, leaving him messages on Facebook, inquiring with his friends, and asking him to share what he is thinking and feeling.
This only makes women more nervous and anxious, and in an attempt to not lose their man, they try harder -- which often makes them come across as needy, clingy and desperate.
A man feels good about you when he sees you smiling.