Still Cryin'

Why is my pup such a crybaby? He cries CONSTANTLY and I don't understand it. He'll sit next to me on the couch and make tiny whiney noises and I don't know what he wants! I'll bring him toys, try to hug him or rub his belly, he just kind of sits there mewing like a baby cat. Even when he's playing (say, chewing up his big rubber toy box) he will cry. "Chew chew whiiiiine chew chew". It's so silly! I don't know what he wants. Sometimes he looks at me and I think, "What do you need? Am I neglecting you?"

I don't think he's ill or in pain because he acts normally most of the time, but when he sees me, the little meows begin. I've told him firmly not to cry for attention, and ignore him, but it gets worse.

Is it just me?