I have a automatic self defense mechanism which makes me more evil in reaction to specific events... (i.e it is impossible for me to ever feel sad or depressed in any possible situation)
so within a day or so i would go from liking that person and caring about them to feeling absolutely nothing at all about it or them, and certain thoughts i may think at these times if told to lets say a shrink, they would get a gun and shoot themselves in the head.
If postive things happen i will calm down and not be so evil and then will be able to forgive