At this juncture , I would suggest two options -
One , (this applies only if you believe in God ) just hand over the issue to the Lord . Ask HIm to give an answer . Means Your Soul , alongwith the Supersoul will answer the question in a way that you will properly understand .
Two , (this applies to anybody ) just leave the other person (if with permission very good , even without permission take leave ) for at least 3 months . I mean no contact at all . No meetings , no calls , nothing . You just live as if that person were dead . Then come back to an answer . That is , did you miss him seriously ? Did you think you were happier without that person ? Were you crying almost all days for him ? About him ? If your answer is yes for the last 2 questions , then go back and start living afresh with him , because you have to settle scores with him still. And I think you got an answer .