Forgiveness??

How do you forgive someone when you don’t feel like they are sorry?

I am a Christian.  And, as a Christian, I am called to forgive.  Whether the other person is sorry, or not.  But, I don’t know how.  I know that forgiveness is a gift I give myself and blah, blah, blah.  How?  How do people truly forgive their spouse for an affair?  What if you don’t really feel like the offender is sorry, or regretful?  What if you just really don’t think that they understand the impact that their actions had on you?  What if they seem like they are sorry in the same way they would be sorry for stepping on your toe?

I feel like I have a virus, that is infecting every part of me. It’s making me sick, in all of my body, my mind, my heart, my soul.  My mental health has taken such a hit it’s scary to me.  My physical health is suffering.  I have constant pain in my neck and shoulders that can only be attributed to stress.  And my heart, is just broken…

I have no desire to forgive, but I feel like I am supposed to.  Why should I forgive?

Anyone have any tips or ideas or care to share where they are at on this one?