When it comes to love, not everyone moves at the same pace. Some people fall head over heels at first sight, while others don't take a single step until they're certain of their feelings. These zodiac signs are among those who don't readily surrender their emotions, often being cautious and at times even distant. For them, love isn't a thrill to be rushed into, but a bond that needs to mature patiently. Here are the five zodiac signs that don't fall in love easily, thinking a thousand times before opening their hearts...