Seems to me that the word for forgiveness often used in the Bible literally means to let go of or "let go off". As I take it, it is something that benefits you as much as it does the other person. You often hear victims say they forgive their offender in the sense of not letting the murderer or rapist or whatever have control over their lives. They "let go off" in the sense of moving past the terrible offense.
If the person is interested in what the Bible requires, try this Scripture:
"So each of you needs to be careful. If your brother sins [against you], confront him about it, and if he has a change of mind and heart, then forgive him. -Luke 17:3 Bible Gateway The Voice
That seems to put the burden back where it belongs, on the offender.