Did you know that I've done a lot of terrible things and can't bring myself to apologize for any of them?
What was this terrible thing? And why can't you apologize to them?
I don't want to face the person and I can't stand back and watch them suffering
It's good that you are having such guilt over this all and that you shouldn't have done something so wrong, but you still have to confront them in the end. They deserve your apology and they don't deserve to continually suffer because of you.
I just don't want to.
If you've truly done something terrible, then you should apologize regardless of if you want to or not. You would be lifting a huge weight off of your shoulders, and wouldn't that feel so freeing?