Face pro quo
You act nice on social media just so your friend will do the same. It's like you're both trying to be the best at being fake. No one wants to be the last one to look like a dork.
'That dog is cute!' (while your dog is currently eating your homework)
'You look like a wizard!' (because you're wearing a hat from the 80s)
'That trip was epic!' (while your trip was just a 10-minute walk)