Dreams
Ever had a dream about someone you know, but someone you don't know particularly well even though you've hung out with them quite a lot in the past - and they're really incredibly nice in the dream and you get on far better than you've ever done in real life and it's just awesome and then you wake up and miss them - even though in real life they're hardly like that at all and you haven't spoken to them or seen them in months and months? Been driving me mad all day.