Depression Support Group
Depression is a real and debilitating condition that is often misunderstood by family and friends. Its meaning can range from a prolonged period of sadness to an actual mental illness with specific symptoms. Find and share experiences with others who are going through the same struggles.

Sometimes verbal declarations of love can be overwhelming and more stress inducing when in the throes of depression. It can bring on more guilt and feelings of being undeserving of such love and also more feelings of being a burden.
My suggestion is to be quietly close at hand - close enough to catch her if she takes a big tumble, but far enough away for her to be able to focus on her and not worry about you and how her dark place is effecting you.