What do you do when your best friend isn't who they say they

What do you do when your best friend isn't who they say they are?
What do you do when the one you adore, doesn't feel the same?
What do you do when the guy you know is right for you, is with the girl that is totally wrong for him?
What do you do when you love someone more than life itself but you know you have to let go?
What do you so when your boyfriend starts to see how mizerable you are with him?
What do you do when you screwed up and you can't fix it this time?
What do you do when you feel as if the world is crashing down on you?
Gee, I wish I knew....

*Happened to me before*