Oh OP - sorry to hear you are feeling down.
We all feel like this sometimes, and BE is definitely the place to come. Never apologise for moaning - we're all here to pick each other up and offer a helping hand.
I agree it is so hard when those around is seem to breed like rabbits. But your time will come, and you will love your little one so very much. Someone wise on the board once said - no one ever said it would be easy, just that it would be worth it.
But if pearls of wisdom aren't your thing, then maybe these will make you smile:
http://icanhascheezburger.com/ (scroll down to Harold's poker face - my personal favourite of the day)
xx