Unrequited Love

Unrequited love fits "The Great Gatsby" perfectly. Jay Gatsby is in love with Daisy and Daisy is in love with Gatsby. They both love each other very much. Even though Daisy is married she is still having an affair with Gatsby. Tom is having an affair with Myrtle. Even though Tom is having an affair on Daisy with Myrtle he still loves loves Daisy very much. Tom also cares for Daisy very much.
Daisy doesn't love Tom anymore. After she met Gatsby again after five years they fell in love. Even though Tom "claims" that he loves and cares for Daisy, Daisy knows that he doesn't really mean it. Since Tom loves Daisy but Daisy doesn't love Tom, this is unrequited love.
Another example of unrequited love is Wilson and and Myrtle. Wilson and Myrtle are married to each other, but Myrtle doesn't have any feelings toward Wilson. Even though Myrtle doesn't love Wilson, Wilson loves her and cares about her and would do anything for her. He would do anything that would make her happy. Myrtle is having an affair with Tom and she is jealous of Daisy and she wants Daisy and Tom to get a divorce. (http://en.wikipedia.org/wiki/Unrequited_love)