Why do we stop living our life happier, stop making friends, become silent, no goals after a Break up?

Why is it very hard to overcome from it? Why we don't want to live anymore? What the heck is happening?
Why do we stop living our life happier, stop making friends, become silent, no goals after a Break up?
Why do we stop living our life happier, stop making friends, become silent, no goals after a Break up?
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