It was yours....

Girl: I’m having my operation now I love you.
 The girl lay’s on operation bed. Boy stands there with watery eyes without saying I love you too.
Girl finishes heart transplant,the boy is gone. 
 Girl: Nurse where is he?

 Nurse says: They didn’t tell you whose heart they gave you, did they?
Nurse hands the girl a note, 
Girls reads note "I told you it was yours"