Young children always crave attention - it doesn't mean you're doing anything wrong it's just that they love you and if they could they would have 100% of your attention 100% of the time.

Housework isn't important but it's easier to feel relaxed in a tidy home - have you heard of fly lady? have a look at some of her routines. She follows a theory of improvements not perfection and cleaning in 10 and 2 minute intervals ie pick a messy room and tidy it for 10 minutes or find a hot spot where clutter accumulates and spend 2 minutes sorting it. Then step away. I found that relaxing about my house not being perfect and implementing a few small routines helped me get on top of the housework a bit and feel better about the stuff I missed.

I find that when the house seems to be closing in on me that going to the park can be a help - things never seem so bad in the fresh air and if I can't see the mess I feel less guilty about it.