Ive been going through this a little this year - thankfully now over the worst.
I think the most terrible part of it is the feeling of pure alone, that you can be surrounded by anyone/doing anything and yet somehow you feel totally disconnected and remote.
Genuinely feels as if there is no future and things will never improve,
a feeling I would never wish on anybody

I guess before I felt it for myself I was someone who to a degree was of the attitude of 'just get over' but like many things in life, we have to see for ourselves before understanding is possible.
Just another reminder in the long journey to not judge and empathise because we never know what the next guy/girl on the street is going through...