Is it cruel or unkind to deny him the opportunity?
I can't answer that for you, HPL.
Speaking only for myself, if my AXGF somehow got a hold of me with the goal of making amends, I would turn her away. And the reason is her sins against me are unforgiveable. This doesn't mean I wish ill will towards her. I'm not even angry about what she did anymore. But what it does mean, for me, is
there are no circumstances where I can believe anything that comes out of her mouth.
With that said, everyone of us here at FFSA is different. Some of us would be open to the addict making amends. Just because I'm not one of them should not preclude you from making the decision that is best for you. So you have to be honest with yourself, and you have to trust your instincts. If you do these things, then you'll arrive at a decision that you can live with.
Good luck.