Strange? I thought they were all like that to a greater or lesser degree. IRL, I tend to keep my depression to myself & typically arrange things so that I can disappear when I feel that I need to. Only a few know about it & though they 'get it' for the most part, even they still occasionally trot out some helpful comments like the old familiar 'you need to pull yourself together' that absolutely make my blood boil like a fiery volcano. Unless you've been (and to a degree, are) there, you don't really know what it's like...