hey there. yeah... i've heard it said that boredom / emptiness / irritability / lonliness / feeling disconnected can be related...

maybe?

exercise? sometimes i think that part of my problem with that feeling is that my body is trying to tell me that i need to exercise. need some of those natural opiates. need to stretch my limbs and tire my muscles. after exercise... one typically feels pretty good (though i hate exercising mostly). some stretching... some jumping around (aka 'dancing') something like that... go for a run or a bike ride if you are very keen or even a walk... but yeah if it is a chemical you need it is probably your endorphins... yup yup yup.

(there is some evidence that meaningfully connected moments... that social approval releases some of those same endorphins - i think the same but don't quote me on that. that that is what reinforces social interaction. chocolate has some of that... but exercise and / or positive social interaction could quite honestly could be what your body is looking for)

on a related note i'm not sure if those same chemicals are released with positive online encounters... not sure... interesting experiment there for someone who is into that... perhaps ;-)