No matter what you have done Jehovah has the ability to forgive you.
Now that is an interesting comment one could comment on (if you're not worried about burning the bridge).
Tell him that you are quite certain that Jehovah HAS FORGIVEN YOU. It's just the "imperfect men" that refuse to do so. BTW -- That would be the same group of "imperfect men" that have no problem forgiving all the other "imperfect men" who get all the "Last Day - End of the World" predictions wrong. If we/they forgive THEM for their failures, how hypocritical that they refuse to forgive YOU for yours.
I think their top dude Jesus had something to say about Hypocrites.
Good luck and glad you're here among forgiving and understanding friends,
Doc