Addiction

Being pissed off is something you will hopefully be letting go of quick and a resentment is something that eats at you and is a VERY dangerous thing to have especially for people like us. Keeping anger with us is not only uncomfortable but builds and builds until it usually come out in very unhealthy ways.

Deal with the problem and let it go.

I agree with the others. We were all born with the full range of emotions and were going to feel all of them at some time or other, but when you get stuck on the negative ones your just digging yourself into a rut and getting nowhere. Its just natural for things to get out of balance sometimes, but dont just let it all go or you'll end up having to pick yourself up off the ground.

Resentment is defined as 1) being indignant in nature (meaning there was no wrong done to you and you're unjustly angry or the wrong done to you is not bad enough to deserve the amount of anger in your response) OR 2) being persistent in nature... ie you're carrying it with you much too long. 

#2's pretty subjective isn't it.  How does one decide when they've carried something too long?  Since others are telling you your anger has crossed into resentment, you may want to try to objectively think about it.  Maybe they're being unfair and are full of sh*t.  Maybe they're not.

Resent means to feel again. Have ever watched a sporting event and someone twists and breaks a leg. At first you are not bothered by it. Then comes the instant replay. They show it again and again, slower and slower, focusing just on the twist and then the  break. They show it so slow that you can see leg twist and then the bone come through the skin. The more you watch, the more that you grimmace and become sickened from it and then eventually you just can't stand to watch it any longer.

That is how a resentment works too. When someone does something to upset you, at first you get a little hurt, and then angry. That happens to us every day. Then you play it over and over in your mind. The more you play it in your mind, the worse it becomes. Soon, you are focusing on just what made you angry and not the big picture. Just like instant replay.

Most folks get mad and are able to work through it. We, as addicts, like to get caught up in it until it festers into more than it really is. That's a resentment. I hope this helps a little.