Have you ever been in love?
Horrible isn't it? 
It makes you so vulnerable. It opens your chest and it opens your heart and it means that someone can get inside you and mess you up.
You build up all these defenses, you build a whole suit of armour just so no one can hurt you.
 Then one stupid person no different from any other stupid person wanders into your stupid life...
 You give them a piece of you. They didn't ask for it.
 They did something dumb onoe day like kiss you or smile at you and then your life isn't your own anymore.
Love takes hostages.
It gets inside you. It eats you out and crying in the darkness so a simple phrase like "maybe we should just be friends" turns itself into a glass splinter working it's way into your heart.
It hurts.
Not just in the imagination. Not just in the mind.
It's a soul-hurt, a real gets-inside-you and rips-you-apart pain.
I hate you.  Neil Gaiman