Should I cancel my Mexico vacation?

My boyfriend and I are scheduled to go to Cancun on Vacation the 1st week of March and we are staying for 4 days. We are a little worried with all the intense coverage of killings going on in Mexico and are being warned by family and friends not to go and to cancel our trip. How safe is it in Cancun? Would it be best to cancel the trip to Cancun and go somewhere else?