About a year ago, I took an anatomy/physiology class. On one particular day, we began to talk about the cardiovascular system. I took this one thing out of that class and have carried it with me ever since.
"The heart is a strange organ. it has it's own independent system, separate from the brain. In case the brain fails, it can still beat by itself."
You can't control your heart, no matter how hard you try. It loves who it loves, and there is no changing it.