First of all, thank you for the advice about hate.
I would just like to comment on two more things and perhaps you could help me find better ways to cope with them.
It is actually really hard to put oneself in someone else's shoes when that person had done something very wrong to you for no better reason than the fact they didn't like you.
Although ideally we should not hurt others when they have done nothing to harm us; however, this isn't really true in the real world. People tend to hurt those that they don't like just because of the dislike. In this case, it is really hard to forgive those unreasonable people. What should be done in this case?
It is also difficult to let things go when someone had hurt you permanently or in the long term. There is no way to change or lessen the damage, and the damage continues to affect your present and future. In this case, what should be done? The pain continues and the associated hatred continues to haunt you.
Comments by FM
I understand how you feel. I suggest trying the tapping method to clear whatever emotions that's making you feel the way you do.