You have heart disease and must have a heart transplant otherwise you will die

Luckily there is a mysterious person who is willing to give you his heart and you immediately undergo surgery

When you were post-operative, you saw only your parents, your eyes kept looking for your boyfriend Caiden

"Mom, where is Caiden?"you ask weakly

Your parents didn't answer and just looked down sadly and you started crying when you realized the heart belonged to Caiden