Perhaps for a long time. Following a fight, you probably wouldn't feel relief in its purest form because relationships are so complicated. Relief can be mixed with anxiety and guilt, even dread. But pay attention if you're feeling this emotion, especially if it's stronger than any other. Perhaps you wanted out of this relationship and didn't even know it.
Some arguments seem to erupt out of thin air.
Maybe your friend or loved one was feeling angry and didn't show it. Or maybe YOU have been angry and didn't recognize this emotion in yourself. If a sudden, nasty fight leaves you feeling shocked, it could be a signal that your relationship isn't as honest as it should be. If you want to keep this relationship going, focus on getting little things off your chest, and having your friend do the same. This is a painful emotion because it's often associated with death.