My boyfriend smacked me across the face but got my ear and is been two day and the ringing in my ear just won't stop what do I do ?

This can cause serious injury. You need to seek medical attention.

** And I hope you called the police and have left your boyfriend.

Excellent advice from Fr_Chuck. Get an exam right away. If you haven't already left your boyfriend, do so now. If this is the first act of violence, know it will get worse. Report him and move on immediately. You may not get another chance to decide if he'll hurt you again. The next attack could be deadly.