Respecting other's free will

[Patrick]

Well I would say there is some external enforcement in that case.

So then the option of no longer being friends might not be on the table. Which means interactions will continue.

I think adopting an attitude of acceptance without the wish of changing the other person in any way might help with time. From experience, even with such an attitude the other might seek confrontations, as in they want the fight. But that's a next step that may not happen for you here. Maybe just accepting this person will be enough.