Sounds like they're just imposing their own views on your feelings. Just keep setting them straight. I guess sometimes depressed people do get quiet or act sort of low key, but I'm naturally that way anyway, and it's just because I tend to be quiet and introspective, not necessarily depressed. I know if I don't talk with a lot of exaggerated inflection in my voice, sometimes folks will think I'm low.

Silly, isn't it? Just because you don't have to be running your mouth all the time like some idiot chatterbox doesn't mean you're depressed.