Because the only reason people disagree all the time is because people are irrational. I think with age comes a bit more capacity for acceptance, but time doesn't forget. Immaturity, deceit, materialism, doubt, weakness, death, betrayal, jealousy, disillusionment. Within ALL real love is some degree of imperfection. There is no fairy tale.
Conflict hurts, and persists, but love goes on.
Whether together or apart, one can never really stop loving a person whom they have really loved. Because we love people for who they are. And because we all have different agendas, unfortunately, loving someone usually precedes regret, unless he is the one whom you spend your life with. But regret for the first one, or the one that she doesn't have will still be with her, no matter what her fate. So, yeah, I agree too.