love.
" It’s the best kind of  l o v e
It’s the kind that
you dare not admit to yourself
in case you’re  m i s t a k e n 
Born out of a friendship and a  t r u s t 
A love of which you’re not even aware
until the very sight of her
causes all the  o x y g e n  in your lungs to escape
leaving your  h e a r t  a vacuum. "
- Chris Pitt-Goddard, Spy
(Credits to dreamyspirit)