"There's a Korean word my grandma taught me. It's called Jung. It's the connection between two people that cannot be severed even when love turns to hate. You still have those feeling for them, you cannot ever completely shake them loose of you. You will always have tenderness in your heart for them." (To All The Boys I've Loved Before by Jenny Han)
I strongly believe that Jung could be defined in many forms in our daily life.
It should not always be considered only as love as it may and probably can be seen through compassionate, sympathy, affection and also attachment.
Basically, love is only best defines as a combination of emotions like anger, sadness, happiness and fear and it is more than liking someone.
It is often hard to measure as people yearn for it, live for it and die for it.
That's what I was been told in one of my lecture class of psychology.
As for Jung, it can been seen variously as it is a connection that builds up between a person and another person, or a person with an animal or maybe a person with an object that they fond of even after they fight with each other, break up or didn't talk for a long time.
I believe the difference between love and Jung is that love is scary as it changes and go away.
As for Jung, people don't realize the connection they have with someone even after things have fallen apart between them.