The problem lies in the fact that most people don't know how to deal with depression or depressed people since they've never really had to deal with it personally. They might:

1)think that they are helping you get out of your "funk".

2)think that you aren't really as sad as you are. They can't comprehend true depression (most of the time).

3)just be completely oblivious to how you are actually feeling.

Just something to keep in mind. Hope you can find something in your life that brings you peace and a content heart.