I dislike characters who suffers from what I choose to call the unhealthy kind of jealousy. Especially when that character is painted as the perfect boyfriend/girlfriend and no measure is taken to stop this kind of behaviour.
One thing is to show the reader that this is not the kind of person you want to share your life with, and to show how far it might go. But when you don't let the character exposed for this kind of behaviour react to it at all, you are sending a signal saying "this is ok". Grr, I find that a lot in the PNR genre. This time it was one of Charlaine Harris' character's in Dancers in the dark.
So I love parts of the Sookie Stackhouse series, and more than one of her bailers is possessive out of this world. Still at least Sookie has the guts to say "I rescind your invitation!". Sookie tells the world that she will not be bossed around.
What is your opinion on this kind of legitimation on this kind of behaviour?