A coma is a great excuse to meet the parents.
Learned from: While You Were Sleeping (1995)
Is your romantic crush in a life-threatening coma? First of all, that sucks. Secondly, say hello to perfect opportunity! Even if she wakes up without amnesia, you'll have had the whole time that she were comatose to convince her family that you two were dating before the unfortunate accident. When she wakes up, your love interest will just think she has amnesia, and you'll have an in to make her fall in love with you. Think about it: If you're willing to do something like this, then you must be a delightful person.
Hey, it worked for Sandra Bullock in While You Were Sleeping, even though she ends up with the guy's brother at the end of the movie. Whatever, as long as she's happy.