My seven week old lights up when he sees his dad. With me hardly anything, a couple of smiles and gurgles if I sing his (my) favourite songs and make some faces. Otherwise he's looking around for something far more interesting.
It hurts a bit and I know it's utterly irrational to think he dislikes me. But it's just rubbish when I'm the one with him all day, changing nappies, making sure he's fed, washing bottles and clothes.