Just remember that you only love her because she is young and attractive. Had she been twenty years older you would not even notice her as she walked passed you, or cared about her if you talked to her.
Just remember that she is in no way special. You tell yourself that she is different from other women, not like them and so on, and you must keep telling yourself this. When you realise she is just like all other women your love will die because there is nothing worthy of love in an average woman.
two quotes from "The Metaphysics of Love" by Schopenhauer
A voluptuous illusion it is, deluding man, that he
will find in the arms of a woman of beauty pleas-
ing him, greater enjoyment than in those of any
other; or even an illusion fixed exclusively upon
a single individual, which firmly convinces him
that her possession will yield him overpowering
bliss.
In accordance with the described character of the matter, after he
has finally obtained satisfaction, every lover will
experience a wonderful disappointment. He is
amazed that what was desired so passionately
accomplishes no more than any other sexual grat-
ification.
