Re: my baby is hardly ever happy!
At 6 weeks my DS still wasn't smiling or interacting much yet either. He was still screaming his little head off for everything except breastfeeding. I think the behavior you're describing sounds typical- actually week 6 for us was by far the worst week ever than it got better from there. At the end of week 8 we could get him to start smiliing and cooing back at us, and it has just been uphill since then. Hang with it and you will start to slowly see signs of a really happy baby in there!