It is absolute, but can be very difficult practically speaking, especially if you, yourself, have been hurt, or suffered loss. But yes, we must forgive. What that looks like and how God brings that about in our souls may be different depending on the case. You may forgive someone, but may not trust them, especially in cases where a crime has been committed, and there is no apparent remorse. Or, in cases where bad behavior does not seem to stop.
In other cases, as in forgiving abuse, forgiveness may feel like more of a process / journey. Old feelings, anger, hatred, disgust, sadness, may boil up sometimes. We have to deal with those as they come.