Scorpios' jealousy can make them bad partners, but they'll be loyal until the end.
Cancers are loyal, especially in love. They'll devote their lives to their partners once they find them.
Leos fiercely defend their loved ones. They become emotionally attached to their partners, and if something bad happens to them, they are devastated.
Tauruses, especially when it comes to their loved ones, are stubborn. They are one of the zodiac signs with the most loyalty and are picky about who they love.
Libras, the rulers of love and romance, tend to commit for life. Indecisiveness, vanity, and love for love can sometimes get in their way. It can destroy their relationships if mixed improperly.
Though their twin sign suggests otherwise, Geminis are loyal partners. Geminis are great in relationships, but people don't recognise it.
Aries falls almost exactly in the middle of the "loyal vs. not" scale. Sure, they're committed to the people they love, and they're too principled to be two-faced.
Virgos are too paranoid to be completely loyal, but they are also too paranoid to be shady or leave someone on uncertain terms. If they love you, they'll stay, but they'll move on when their interest wanes.
Capricorns are less loyal than other signs but not untrustworthy. They like to lead relationships and can become overly attached to people who don't reciprocate.