I'm Sorry

I'm Sorry startingover: I know that it wasn't all your fault, I made my own mistakes in the relationship.  I said and did things that were wrong and I can't take them back or I would. 

I'm not going to say that if you hadn't done this, I wouldn't have done that because we both screwed up.  What I don't get is why when you came to me to ask for forgiveness I gave it to you, but you won't do the same for me.  I guess what is good for the goose isn't good for the gander.