The phrase "sweep someone off their feet" can be a powerful way to convey the feeling of being overwhelmed by a person's charm or grace. However, there are many other phrases that can be used to express this same idea. For example, you could use the phrase "enchanted" to describe the feeling of being drawn to someone. Other synonyms that might be appropriate include "captivated," "bewitched," and "entranced." Ultimately, the key is to choose a phrase that conveys the right tone and emotion for your particular context. Whether you are writing a love letter or simply trying to describe a magical moment, there are many different ways to express the idea of being swept off your feet.