There are three types of people in the world 1) People who have requited love 2) People who have unrequited love 3) People who don't know what the word requited means, amirite?

definitely number 3

Aren't there also those people who know that Freddy's "guess" of the definition of requited is correct but just don't have love?

im in the third group...

Requited love is when you love someone and they love you in return.