Dear Unnamed Family Member,
First of all, I am not required nor do I want to spend every waking second of my day with you, even if I don't see you all that often in the first place. I am an independent and introverted person by nature. I spend the majority of my days alone. I am perfectly content with this. I have spent a great deal of my time lately with my family because of Thanksgiving, and it's only a matter of time before I'll want some space to myself for awhile. This does not mean I don't love you. This does not mean I don't love any of my other family members. It's just who I am.
And so, the fact that most of my time is not spent with other people does not mean I am suffering from depression. And when I tell you I don't have depression because I enjoy being alone a great deal of the time, I am not in denial. I know myself a lot better than you do, so please don't act like you know what's best for me. Please take your unsolicited advice and stop pestering the crap out of me.