I'll do you one better.
When I was 22 and trying to kindle my relationship back with God after the birth of my first child, my then wife ( now ex) realized she was pregnant with my step brothers child (which was unknown to me at the time) and wanted an abortion. We fought about it but she was determined to have the abortion the morning she was scheduled, I left the house and made her take care of our child. I was making it difficult for her.
Two hours later my 3 month old child was dead. There is ample reason to believe my ex suffocated her. Her death was declared as SIDS.
I hated God more than I hated my ex. Ironically, I was able to forgive her before I could forgive God, which really is to say I didn't really know God to begin with.
Perhaps God just put it in my nature to forgive those who I love. But it's forgiving those I don't love, much like the case you describe with a hit and run that I really struggled with for some time.
Forgiveness doesn't release the offender from their trespasses simply because they own the repentance part. They have to repent. Our job in forgiving them means their trespass doesn't live rent free in our head tormenting us. For me, I've still got work to do, but I know its Jesus who gives me the strength because I trust that he is doing a work in me that brings a peace beyond understanding.
I am truely sorry to hear of this.
May I ask how would you have reacted if someone told you that you Had to forgive your x?
It is the insistance that Christians Must forgive that I object to.