Why we are never happy

Hi

Happy Monday to you all, who are nice enough to drop by for a read.

I was looking on Facebook at my friends status updates and it griped me a little. Now Im not the most positive person, far from it, most of the time I am a 'glass half empty' kinda girl for my sins. But there was one of my friends who, how do I put this without offending, she had two girls quite young, is single and has not worked in years, nuf said, think you get the idea. So she has just gone out and got herself a job, really good on her, she has been doing it a week or so, but now she is moaning because she has some reading to do on a sunday night before going to work the next morning (although she is in her training period). I had another friend some time ago, who moaned about having to work, period, this was a time when my husband was out of work, and desparately wanted to work and I couldnt help but be annoyed.

But why are we never happy with what we've got, not in a 'I can do more' way but just in a constant discontented way. It's like we like to be unhappy, to moan, to want something other than what we have, which is often what we started out wanting in the first place.