There is support - but it is not all that obvious. Women who feel sad about not bf are too often told 'don't feel guilty' and 'it doesn't matter - you have a healthy baby, what's the problem?' or 'there is too much emphasis on breastfeeding'...none of which addresses what they are feeling now. Poor dhs - they try so hard to support and like Sponge's dh, can't understand the tears, and end up saying the 'wrong' things.
As an NCT bfc, I often listen to mothers who feel less than ecstatic about formula (the feelings can be mixed - sometimes, there are feelings of relief as well) and some who feel absolutely terrible. NCT bfcs are trained to listen and support, and not judge. I have heard from many, many women who are sick of being told 'it doesn't matter' - they are intelligent enough to know that in the long run, it may well matter less and less, but for them, it's a source of distress at the moment. Their idea of being a mother was tied in with bf. Now, it isn't happening. It's ok to feel sad about that.
There is also a very good website called MOBI - Mothers Overcoming Breastfeeding Issues - with an attendant email group. It's \link{http://www.internetbabies.com/mobi/here}
Not everyone will find it helpful, as it does not try to tell you that not breastfeeding is no big deal, and for goodness sake pull yourself together! Instead, it accepts that for some women, it is a very big deal, but it gives hope you will be ok about it in time.