If you somehow meet your ex , how would you treat to that?????

I already ran into my first love and it went cordial... he’s married and in med school so he’s doing great! Haven’t ran into the other ex in Texas and I hope that I never will... he’s the one who got me into bad things and ruined me... the people I “dated” in Kentucky weren’t really relationships... more like notches in their belts/ and I was recovering and in a bad place and i have 0 contact with them...