Who started “Overly Attached Girlfriend”?

Laina Morris, on YouTube, Jun 6, 2012. It reached 8 platforms in 9.5 years.

LineageEach dot, 1 image macros reported in first five hours, more than 175Key steps, 11 of 12. Lines follow time and platform
Laina MorrisFirst postyeahhtoastRedditThe Daily DotPressMilestonePressPlatform jumpOwner responseOwner responseCommercialPlatform jumpAfterlifePatient zero