What is true love?

What is the meaning of love? I believe that true love means you are willing to go to certain extent to defend your love. It also meant that you are willing to sacrife for your love. In this modern era, in the middle of materialistic world, we often blur the meaning of love. Most people will sacrifice for the sake of material items. For example: Pretty and attractive women often attracted to unattractive but rich men, and vice versa, and keep using the word "Love" to express her or his feelings. Therefore, in a nutshell, to find "True Love" in this modern but materialistic world were not as easy as we thought, just like in the movie.