Fight your own battles - Idioms by The Free Dictionary
fight your own battles
fight (one's) own battles
To try to overcome challenges without help from anyone else. Mom, he's not a baby anymore—let him fight his own battles.
fight your ˈown battles be able to win an argument or get what you want without anyone’s help: I wouldn’t get involved — he’s old enough to fight his own battles.
References in classic literature
Perhaps you think I am come on purpose to quarrel with you, knowing Weston to be out, and that you must still fight your own battle
You have to fight your own battles
and your own pain.
I was told: ``You are old enough to fight your own battles