Of course I’ll hurt you. Of course you’ll hurt me. Of course we will hurt each other. But this is the very condition of existence. To become spring, means accepting the risk of winter. To become presence, means accepting the risk of absence.
You never get to the point where you think “I am the adult”, but you do get to the point where you think “I’ve dealt with this before.” The older you get, the higher and higher the percentage is of things you’ve already been through. Have you ever changed a tire? Had a flat tire? Someday, you might, and the next time it happens, you’ll know what to do, since you’ve already done it.