The signs reasons to be sad-

Aries: hurt by people close to them
Taurus: have trouble doing things
Gemini: shit out of their control just keeps happening to them
Cancer: social outcast
Leo: best friend is really controlling
Virgo: someone they have feelings for is into someone else
Libra: in love with a fuckboy
Scorpio: stabbed in the back
Sagittarius: everyone thinks they're creepy
Capricorn: disliked by all their friends
Aquarius: don't understand their own emotions
Pisces: has alot of unwanted responsibility

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Note that these are the stereotypes and that they may or may not be true. Please do not be offended as it is not directed specifically at anyone.