No shame at all. I kept a diary during my last bout of depression. Every now and again I re-read it, just to remind myself of how nasty an experience depression can be. I don't have a problem sharing those experiences, as long as those experiences don't become or appear to be used as a crutch. Depression is aweful enough, even worse is not doing anything about it. I am empathetic, sympathetic and can lend an ear to bend, yet I encourage anyone who thinks, feels or are concerned about depression to get assistance. Having the right sort of support network is incredibly helpful but this doesn't replace people who are trained to help.
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort.