You and Chris were best friends since childhood and started dating when you guys turned 17. (your now 20) One day Matt was busy and couldn't drive Chris to one of his friend's house so Chris called an Uber. Someone hit the car Chris was in and he got hurt. Badly. Now you're at Chris's side in the hospital. The doctors said nothing physically was wrong but when they asked Chris who you were he just looked at you.

"I'm sorry, I-I don't know"

that's when it hit you. He doesn't remember you. You're going to have to make him fall in love all over again...