Should have gotten a female.
Have you ever heard how girls are daddy's girls and boys are mamma's boys? Well that generally holds true with the little dogs too. I wouldn't make much out of his actions since he's just a baby. Just don't do anything, and let him come to you in his own good time, then don't go overboard when he does. Just a quiet good boy and a pet is all. Eventually he will be more apt to be with you more.
