(Bob=crush)

Openly tells Bob their feelings no matter what they think Bob feels:
LEO, Pisces, Aries, Libra

Just tells their friends about Bob and ignores Bob otherwise:
Capricorn, Aquarius, Cancer

Keeps it too themselves and lies that they don't like anyone/Bob:
Scorpio, Virgo

Bob tells them that he/she liked them (or naturally forms a relationship):
Gemini, Sagittarius, Taurus

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Lucky Gemini and Sag and Taurus! Sorta tired today... Happy late leap day!! Byye now i gots to go and eats