When does passion become obsession?

When that is all you can think about. Whether its passion or something else, you become obsessed when you cease to see things as they really are and can only concentrate on that one thing.

Passion becomes obsession when the item/subject/person is all you can think about. The obsession drives you crazy at some point, causing your mind to rebel against itself and abandon the obsession. Then you take interest in something else, and it slowly becomes a passion, restarting the cycle.

It becomes an obsession when you become overly passionate in your passion, if you get what I mean.

once you have interest you experience a deep love, yet with obsession you are able to no longer get it out of your recommendations each 2nd of your life. you like the song deeply, and you have good desires, yet do you think of roughly it invariably?

When you become the tool of your goal.

when you surrendered to passions

...when you deny its over...