What is love? What is the difference between loving someone and having a crush on someone?

Lee Hyerim is no ordinary person, she is not just some girl out there that falls in love easily, but she does have a few crushes. Although she does have crushes, they don’t seem to last. She will always find guys out there that is cute all the time but she never sticks to one longer than a month. Her crushes never pass a month because there is always something that will turn her off. Why is that she will have a crush on someone but they will eventually turn her off? Will she continue to crush on people but eventually get turned off? Is Jung Daehyun going to be one person out there that will make her fall in love and change her point of view for a guy? Will he be able to change her? That is definitely going to be hard especially if she cannot be committed to one person. That has never happened before so she practically believes that it is impossible for her to fall in love.