liking someone who is already in a relationship
Liking someone who likes you back, but they’re already in a relationship
Liking someone who doesn’t like you back
Liking someone who doesn’t exist.
Plot twist: The next companion is a normal girl/boy who only dies once in their lifetime and has no remarkable back story but he thinks they’re wonderful because they are human and the Doctor needs reminding that you don’t need to be a mystery to be remarkable.
so basically we want Donna back