The first and last chapter

The title translates "You promised to be always near".
A few years ago the guy saved the girl. He promised to love her, to be on hand and never let go. But he went, breaking the promise...
She once again sitting on the windowsill, looking out the window and thinks about it. Suddenly the window opens and the girl flies down. The fifth floor. If she fall, be broken to death...

Please excuse me if I do not clearly expressed. I don't speak English(I'm from Russia)
Specially for this website, I translate the text in English. Link to original - http://ficbook.net/readfic/1332841