Pet an animal friend, or a friend’s animal, or a friend. Probably ask the friend first, or maybe don’t.
Don’t be afraid to hug your mom/kid/cousin/friend.
If animals and friends elude you, find a stuffed animal/monster/alien/person that will let you cuddle if for no other reason than because it has no choice.
Watch cartoons or sitcoms or romcoms, and deliver some good feels into your brain.
Look for eyebleach (not literally bleaching your eyes!), and try to put the terrible thing behind you.
Correction: how do you sleep after seeing something on the Internet?
Good luck!
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Engage in something else, something fun maybe. A good movie could fix a lot of things, if that doesn’t help time is the cure for everything.