The Brief: ILY is an abbreviation for "I love you."

DEEP DIVE
The term can be used casually or more seriously.
Ily forever and always Demi๐โจ pic.twitter.com/ReFgpjrX7M
— Cassie (@cjarzyna) August 6, 2018
i think use of โty,โ โily,โ โhbd,โ is weird and impersonal. keep it.
— Tyra Alexis ๐ฆ (@TheTyraTales) August 6, 2018
Shoutout to @khanacademy for teaching me all the math I know and getting me to college. Ily 5ever
— dani (@danizamz) August 7, 2018