That's a really tough call. A lot depends on how much you want the money. Personally if I did want it, I would say, let's meet today and I'll pick up my money and when we met that is the first thing I would do - get the money.
After that, the control is in your corner. You can just say thanks for paying me back and leave. I think that is probably your best option. You could hang around and rehash the good times?? I don't know what his motive is, but it surely has nothing to do with your wellbeing and I know, since you have gone no-contact, that you are trying to pull yourself out of this very hurtful situation.
If it's not much money, I wouldn't bother and wouldn't bother replying either.
Let us know how you get on.