When your heart breaks, you can feel it. It's not just an expression. Inside your chest, on the left side there is a squeezing sensation. I've usually heard it described as a dagger peircing the chest, but that isn't what I felt. A dagger would be removed, followed by hot blood. What I feel is a squeeze, followed by a twist. I'm not romanticizing this, I know there is no emotion in the heart, it's part of the brain. I know the excess stress of a bad relationship can cause stomach problems such as ulcers or a breakdown of the digestive system. I have the headaches, and the knots in the stomach that an impartial observer might associate with stress. But I don't understand this pain in my chest. A romantic would say it's my heart breaking. A doctor would say I dunno, let's look for other possibilities. I say maybe this pain is why love is associated with the heart.