Well, that’s a complicated question.
On one hand, I do already hang-out with myself basically all the time. I talk to myself a lot and I’m my own wall to throw stuff at.
On the other hand, I’m also very antisocial. I would definitely not enjoy spending this time that I spend with myself with another, physical person.
So, that.
It really might be your kidneys. Do you feel it in your spine or more to the side?
You could also try and do some stretches everyday.