You’re depressed! Saturn is transiting your Moon in Pisces which is a classic signature for this type of feelings. I would go as far as to say you can’t have a Saturn transit to your Moon and not feel depressed to some degree, so the first thing to know and to keep in your Gemini mind is the fact that the things your are feeling are transitory not permanent in spite of their intensity.
Beyond this, I would suggest you go very easy on yourself and try to put the people who would like to see you happy aside in the short term… because this is one of things that exhaust a depressed person. Trying to stay up for the peanut gallery that is. You’d do better to spend your time alone sorting through your feelings or talking to a close friend who knows what it is like to feel “dead”.
Seeing a counselor who can help you sort through this childhood (Moon) stuff that’s got you down (Saturn) would also be a good shot, but bottom line I think you will get through this just fine. Yes it’s dark but it is not going to stay that way. I would be willing to bet your mood lifts once the transit passes and just knowing it is going to pass on its own accord can do a world of good as can a bout of depression for that matter. Because you are by nature a compassionate person and having gone through a time like this, you will be that much more equipped to be compassionate and we need all the people like that we can get.