Forgiveness vs. Injustice

I don't understand why everyone is worried about me forgiving someone. It's not like I don't forgive some people who did me wrong, but still I see no reason to pretend to be friends with people who are stabbing me in the back every time I turn around. There is a limit to what can be expected, realistically speaking, from me. Some of these people really need to find other lives because I am not going to give them a prize for treating me like garbage. That is just the way I feel about that.