The phrase "eating one's heart out" typically means to be consumed by jealousy, anxiety, or worry. Antonyms for this phrase include being content, relaxed, and carefree. Instead of obsessing over something, a person who is content is satisfied and happy with their current situation. When someone is relaxed, they are not stressed or anxious. Finally, a carefree individual does not worry about the past or future, but instead lives in the present moment. While "eating one's heart out" is a negative and stressful state, embracing its antonyms can lead to a more positive and enjoyable life.