Speaking from experience: Cry it out. Get that over with. Then look around you for something that you can expend your emotional energy on. Something that will be worth the effort or appreciated by the recipient of your effort. You will really begin to get past it when you can find some satisfaction in something else.
unrequited love
The unknown boy had romantic feelings for the popular girl, but his love was unrequited.
The word unrequited is an adjective. It means unanswered or not returned.
Unrequited Love - 1908 was released on: USA: July 1908
She loved him, but he did not feel the same way. It was unrequited love.
She had a deep, unrequited love for her childhood best friend, who never felt the same way towards her.
The cast of Unrequited Love - 2009 includes: Max Irons as Tom
"unrequited"http://www.merriam-webster.com/dictionary/unrequited
When it is unrequited.
Love: Unrequited
unrequited love and jealousy as common themes
The cast of Unrequited Love - 2006 includes: Gregory Dart Rebecca E Marshall Vibeche Standal