Break ups.

A fever is the bodies attempt to boil out the bad things within your system, which in the end might get rid of the problem, but it ultimately does alot more harm than good. I believe it is the same thing with break ups if you try to hate your ex with every fibre of your being it only ends up hurting you more in the end. Sure I know you shouldn't love them because there is a reason that they are your ex, but to just hate them only leaves you with feelings of self loathing because you ended up with such a bad person. I believe if it ends, it ends, just move on, because hatred is just like a fever it will only hurt you more in the end.