When people experience strong negative emotions like anger, jealousy or pain, they usually do one of two things — bury their emotions deep in their subconscious, or get so caught up in their emotions that they are consumed by them and adopt them as part of their ongoing identity.
Neither choice is healthy — instead, when a strong negative emotion arises, learn to observe the feeling (the act of observation immediately disassociates you from the emotion) and ask yourself what it is trying to teach you. Do you need to work on yourself and grow into a more resilient and peaceful person, or do you need to make crucial changes to your life situation?