My boyfriend of 7 years just told me today that he's going away with the "boys" to Cancun? What do you think?

He's been telling me that he's going on a job related trip to Tennesse for the past couple of months. Today he confessed that he's really going to Cancun, Mexico for 7 days and he had planned this trip when we were mad at each other. Should he stay or go now that I found out and don't want him to go?