Sleep and relaxing

I find it really difficult to sleep unless i’m really tired and I can only sleep if the air around me is cold with a cold pillow, I think I might have insomnia. 

I also can’t sit on a chair without clapping my knees together constantly, it happens without me even thinking about it.

How do you relax? 

Because the most relaxed I feel is when I’m playing sport where everyone else says relaxing is lying down doing nothing. I don’t understand why anyone would do that because it’s not fun or productive and just a waste of time. 

Is it just me or is this relatable?