Passionate love versus compassionate love?

After reading "The Happiness Hypothesis" by Jonathan Haidt, It came to my knowledge that there exist two kinds of love: passionate love and compassionate love.

Check out these two graphs: link link (The first one is over a period of 6 months while the second one over 60 years of shared love)

I do not really understand the difference between these two kinds of love. Like, if you are compassionately in love, does that mean you aren't madly in love with your partner?

So, I would like to know what you think about the difference between passionate and compassionate love. Examples will be great as well.

Thanks. :)
Passionate love versus compassionate love?
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