Need help

The way i feel reminds me of a Beach Boys song.  Help Me Rhonda, Help Me Get Her Out Of My Heart.  There is nothing in the world like unrequited love.  To do all the right things and still not get the girl.  To take someone at face value, and be let down.  It's my fault that I fell in love, or is it.  Do we really control any aspect of falling in love.  I'm really ate up over this woman.  But like anything after a few months everyones true colors shine.  I've let her hurt me time and time again, and I know I should walk away.  What's wrong with me, that I can't seem to let her go.  I'm finding that the very things I admired about her, are the things I now can't stand.  It's funny how things will change once you see the big picture.  I just needed to vent, thank you for letting me.  I know God has a plan for me, and that I will take the long way to get there.  So anyway here's a question, how do you get her out of you haed and heart.