Forgive, But Never Forget?

I say ‘I am not resentful’, but others would probably not agree, like my siblings. I think that I don’t hold grudges, but when my siblings point it out and I realize that maybe I am. It's hard to be okay with someone after they do you wrong and then having to act like nothing happened, well then at that point I am being a twofaced person just so the other person does not know I do not like them. As I grow up I have noticed that people have done me wrong, but since I don’t want to hold those types of feelings in me, I act like I forget? But in reality I am just hiding those feelings and act like everything is okay when it's not!!! I have been told that resentment is poison to the heart and soul, but I look at those people and they do secretly hold resentment. When it comes to me I know I want to be happy so for me to do that is to forgive (depending on the situation) but do not forget.