What Type Of relationship has the greatest impact on your understanding of who you are or your self concept

To know what kind of relationship you most identify with and feel most comfortable with, first you must be clear about your own concept, you must know who you are, what do you like and what do you dislike. According to this, I consider myself a happy person, lover of freedom and enjoy the little things in life, therefore the type of relationship that has the greatest impact on the understanding of who I am, is a sincere friendship, because for me sincere friendship allows you to be who you really are, does not involve falsehoods, it gives you freedom, joy, confidence and implies having a person in the good and bad moments of life. A sincere friendship must exist between friends of course, but also between couples in love because according to my way of seeing the basis of love is friendship and trust.