I think sometimes it can be both.
Mostly mental but it definitely can be physical at times. You can take your mind out of loneliness but it's harder when it is physical.
Can they be separated?
Mental state of mind.
Mental. It can affect you physically, but for what I see, it's starts from a mental state.
I have to say both.
yes I am often alone but rarely lonely
It's a mental state which has drastic effects on your physical being.
We all know what loneliness is. I think you need to establish some sort of a point before we have anything to discuss.
I think it's both.
Mental state of mind, it does have a negative mental effect on us that can cause physical changes
Mental state of mind in general with tendencies of a physical state of longing to be touched