Alone does not mean unhappy for me at all. Nobody bothers me, I am free to do what I like. I love being alone, and do something for myself.

Haha I don't understand the question. I suppose for some alone=happy. If I'm alone to be happy I could read a book, meditate. 

I enjoy being alone, if I am alone, definitely I will sing aloud like crazy when I have good mood. When I feel blue I was just running along the street for a while.

i sit alone under tree