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.
Just know that you are not alone and that you can only do so much. Gentle hug to you, I hope that every thing works out for you.
If you fully examine your expectations (what you feel would be an appropriate response) of others and the motivations for your actions (what you want to gain from actions), perhaps your hurt feelings will lessen or completely diminish.
Since it is painful for you not receiving any response (and I have been in similar situations), I wonder, as Wandering V has said, if you could gently ask her if you can help her in any way and if your contacts (gestures of kindness) have been helpful to her. I am sure that this will pass.