The idealization of your significant other
In 500 Days of Summer, we see how Tom exalts Summer and puts her on a pedestal. From the beginning, she explains she isn't interested in a formal relationship, but he falls in love with her anyways, and he expects the feeling to be reciprocated. When she doesn't correspond him, he is devastated.
Many people get terribly hurt because they create an idealization of their significant other. We are all human, hence, none of us are perfect. However, we still strive to achieve what is best. Do romantic films shape us into thinking we have to find "the one"?
I'm not saying we should be conformists with any person that appears into our lives, but to an extent, what is –or should be — the limit to measure what is best or who is "the one"?