I am always happier on my own.
The problem with other people is that they have their of personality, their own feelings. This rather gets in the way. I have my me to deal with, must I deal with you also? Then they start to speak! This is all lovely, but must I listen to YOU? What YOU did at the weekend? Let's face it, I'd much rather we wallowed in my own existential angst. Perhaps we could say nothing at all?
This is why I want a cat. A cat would be my perfect companion.