Well for one...just act normal. Say hello and leave it be..for your own protection. You have got over it and forgiven, so I would say let it go.
I got over my 'family member' too, I forgave.
But I made the mistake of feeling that it would be even better if I forgave face to face.
Wrong.
It went sideways ....and he looked at me and said- " I have no idea what you are talking about!! " ...

Then I had to fight to 'get over myself' and forgive all over again!!!
Unless God Himself gives you clear directive , smile, say hi...and keep your heart safe. ♥︎
Just my two cents