Ah dont feel bad. I agree with others that your baby will come around. When they are puppies everything for them is new and exciting. When Maxi was a puppy he wasnt as affectionate as he is right now. He would get so excited with strangers when we would be outside. He would say hello with the wagging tail to everyone he sees. As the time passed by now he is so affectionate with me that he is always giving kisses. So dont worry he ll come around. Im sure he loves you, you are his mommy. I would also suggest playing different games because puppies love that. Challenge him with different games and maybe also start training him with different commands. Those are great examples of bonding with your pup.