Try not to stress about it, just be strong & consistent with your pup and he will eventually learn his place. Anticipating negative things puts a negative energy in the air, try your best to stay positive!
Have you tried the NILIF training? I have been doing it with Dante since he was young, and although he is naturally on the passive side, I feel that it has influenced him, or has been a consistent reminder for him.
If he comes to me for attention, I will give him attention but I make him sit first. He does what his mama wants before he gets what he wants. lol.
*Dante - Light brindle w/black mask, floppy ears & natural tail - 2.12.11 - German Boxer Boy*