Im 19 have a daughter live with my bf dont noe wat to do bout him keep hittin me wen we arguee !?

So we been together almost three years and we have a baby girl and live together him puttin his hands on me strted about a yr ago now we live together nd its still going i recently jus got a busted lip im afraid itll get wrst but i dont want to call da cops because if my bby she deserves to have a father and i dont noe where i would go wat should i doo ! :(