Try and find where my invisible friend went then hang out with them again.

Plenty of good real solutions in the comments here. My creative solution is to add a feature to everyone's phone that automatically will FaceTime them with someone also on their phone in the area. You can't turn it off, you can only add people to your default list. No guarantee they're who you connect to though.

Abolish digital slavery and publicly code and fund the public commons with no scraping or exploitation whatsoever. Restore the rights of autonomy and self determinism required for a citizen in a democracy and people will return to the culture that existed before google won its privateer piracy charter to digitally enslave everyone in exchange for free email and search results because the US was too backwards to fund the fundamental public commons required for real democracy and was itching for slavery again at the first opportunity of going unnoticed.

Why u need creative? If u actually wanna fix it all u need is a shared social activity with a regular attendance of everyone. And would u look at that we just reinvented religion and church.

Is the epidemic one of loneliness or one of improper socialization, a background fear of people and purposelessness? Sadly, idk how to make people change their minds and hearts besides just talking to them and hoping something sticks.