make (one's) peace with (someone or something)
To reconcile with or accept something that previously was a source of stress, conflict, etc. After years of not speaking, Janie finally made peace with her sister. You need to make your peace with the fact that your first business didn't succeed. There will be other chances.
make one's peace with
Reconcile oneself to, bring about friendly relations with, as in He's repented and made his peace with God. This expression was first recorded about 1315. Also see make peace.