Here are some characteristics of emotional immaturity from When the man in your life can't commit by David Hawkins:

1. Volatile Emotions Emotional volatility is indicated by such things as explosive behavior, temper tantrums, low frustration tolerance, responses out of proportion to cause, oversensitivity, inability to take criticism, unreasonable jealousy, unwillingness to forgive, and a capricious fluctuation of moods.

2. Over-Dependence Healthy human development proceeds from dependence (I need you), to independence (I don’t need anyone), to interdependence (we need each other — see also the Seven Habits of Highly Effective People by Stephen R. Covey).

Over-dependence is indicated by: a) inappropriate dependence, e.g. relying on someone when it is preferable to be self-reliant, and b) too great a degree of dependence for too long. This includes being too easily influenced, indecisive, and prone to snap judgments. Overly-dependent people fear change preferring accustomed situations and behavior to the uncertainty of change and the challenge of adjustment. Extreme conservatism may even be a symptom.

3. Stimulation Hunger This includes demanding immediate attention or gratification and being unable to wait for anything. Stimulation hungry people are incapable of deferred gratification, which means to put off present desires in order to gain a future reward. Stimulation hungry people are superficial and live thoughtlessly and impulsively. Their personal loyalty lasts only as long as the usefulness of the relationship. They have superficial values and are too concerned with trivia (their appearance, etc.). Their social and financial lives are chaotic.

4. Egocentricity Egocentricity is self-centeredness. It’s major manifestation is selfishness. It is associated with low self-esteem. Self-centered people have no regard for others, but they also have only slight regard for themselves. An egocentric person is preoccupied with his own feelings and symptoms. He demands constant attention and insists on self-gratifying sympathy, fishes for compliments, and makes unreasonable demands. He is typically overly-competitive, a poor loser, perfectionistic, and refuses to play or work if he can’t have his own way.

A self-centered person does not see himself realistically, does not take responsibility for his own mistakes or deficiencies, is unable to constructively criticize himself, and is insensitive to the feelings of others. Only emotionally mature people can experience true empathy, and empathy is a prime requirement for successful relationships.

This is exactly why I see myself as some type of monster, and get suicidal because it makes me hate myself for what I put others through.

Really powerful thread. I could apply it to my partner, mom, and Ex partner. Thank you for posting.