I second Annabel, a little more clarification might be helpful here.
I am not married, never have been. I have recently entered into poly with two men I've known (and sequentially dated) for over eight years. I find that I have been more forgiving of each of them, of things I was not forgiving about when I was mono with either of them. I don't know that I would call it unpleasantness, but I have noticed that I feel more tolerant.
Love is that condition in which the happiness of another person is essential to your own...
Robert A. Heinlein
Me: female, bi, (formerly hinge of a vee)
with FirstBoyFriend (FBF)(moderately long-distance)
and no longer with CurrentBoyFriend (CBF)(who lives in the apartment building next door)