Usually, if we allow ourselves to feel our emotions fully when they come up, they recede naturally, giving way to another and another. When an emotion haunts us, it is often because we are afraid of really feeling it. Emotions like despair and rage are powerful, and it is natural to want to hold them at bay. Certainly, we don't want to let them take us over so that we say or do things we later regret. When we are facing this kind of situation, it can be helpful to ask the spirit, "How long do I need to sit with these emotions, how long do I need to feel these emotions before they can pass?" If you ask sincerely and wait, an answer will come. Setting a time limit on your engagement with that difficult emotion may be just the technique you need to face it fully.
When you have a sense of how much time you need to spend, set a timer. Sit down and make yourself available to the emotion that has been nagging you. All you have to do is feel it. Avoid getting attached to it or rejecting it. Simply let it ebb and flow within you. Emotions are by their nature cyclical, so you can trust that just as one reaches its apex it will pass. Each time you sit with its presence without either repressing or acting out, you will find that that difficult emotion was the catalyst for much needed emotional healing.