I communicate whatever hurts me to those who matter most to me, so I don't hold grudges.
If I don't like someone or something, I won't pretend to, and at times, I will let them know to their face, because that's how I keep it real. In away, it's a breath of fresh air for me.
In terms of jealousy, I rarely get jealous. I'll only get jealous say.. over trivial matters, like if I'm watching the foodnetwork and I see Rachel Ray traveling and eating, I'll be like "mother..." It's mostly for jokes/superficiality, because I get hungry watching them enjoy their meals at a nice hotspot while I'm in bed drooling.. =)
If someone deliberately tries to provoke action to make me upset, I let them know/or ignore them, afterwards, once we get matters settled. I still respect them. Just don't see any point in trying to be all lovey dovey.