Those around you will appreciate your honesty, and your compassion will show that you truly care about others. The way to learn, as with everything, is to practice. I hope my notes find you well. Understanding what triggers immature behaviors can help you change. In fact, you have to be more committed to your growth than holding onto the relationship.
Helpful acts may also boost your self-esteem.
You can seek to improve yourself and grow as an individual, but maturity allows you to take your present situation and all the past events that have led to it and make peace with them. I was searching for emotional maturity and i found this amazing article. A mature individual is one who is able to look upon the life with an air of optimism while still maintaining roots in reality. I am nearly 35, I have a 3-year old child and what actually made me question my own maturity was that I actually realized I was not feeling like an adult, be it my role of a mother or as a professional or a partner. They are incapable of vulnerability and intimacy, which perpetuates our culture of commitment-phobia and the death of the nuclear family.