I think, regarding marriages, that what seems like a second chance is often a 300th chance, sothis doesn't apply to relationships that are that close.BUT I have always regretted not taking the chance to mend a friendship when I was offered the chance. So on hindsight, I'd grab it with both hands if the chance came again.
Like you say. This person is definitely not the same person. It is a person who has learned something about realtionships.
Best of British Luck
D