You had a terminal illness.

You were Cyrus's patient. Both of you grew fond of each other as time passed by, eventually he fell in love with you and you did too, but you didn't inform each other about it. That was when your time came.

"Time of death, 6:28 PM."

"I became a Doctor to save the lives of peoples loved ones, yet.. I couldn't save mine."

He said as he stared and cried, seeing you on your death bed.