Exactly. If you can not do things separately in a relationship without one feeling excluded, that is not mature love. In mature love, both parties know and understand that each is an individual and must be able to have a life outside of the relationship. You do NOT always have to be together to be in a relationship.
It is natural to be selfish, defensive and full of pride. But it is supernatural to be mature, loving, patient and humble. Training, bit by bit, is the key to developing a child with a good attitude. Maturity takes years, but the fruit of your labor will