Why are your friends jealous when you're happy with your life?

I've been through great depression and terrible breakup, (she knew it)

But after I finally recovered and now I'm just simply happy and content with my life as I carved my own path.

She tells me she is jealous and when I told her but I had to go through a lot, she says "yeah whatever".

Why are your friends jealous when you're happy with your life?
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