Why doesn't my baby like me ?

Basically the whole while my girlfriend was pregnant,when she'd rub her stomach the baby would always kick for her but when I touched it he never kicked not even once ! Now that he's been out for a few days Iv'e been trying to make him like me. But he still doesn't really laugh or smile at me.No matter what I do. I can make myself look like a fool and he still and he still want flinch, at all. But every time his mom looks at him or walks in the room he laugh like I'm not even there. ( Dang, does he hate me or what ? ) I thought having a son would be fun but this isn't fun at all since he doesn't like me.What can I do to make him like me ? Any suggestions are welcome !!!