Vacation

So I am turning 21 in a week and I have been with my boyfriend for about to be 7 years. We have never gone on vacation together because I have very strict and conservative parents that think I need to be married before I go on a trip with a guy. I booked a trip with him for June and I lied to my parents saying it was with my girl friends. My boyfriend is now upset because he says im going to get caught and giving bad vibes about the whole thing when it was his idea in the first place. He says that he wont cover for me if my parents were to find out because he has an AMAZING relationship with my parents and doesnt want to ruin it. I get where hes coming from and its making me angry because I will suffer the consequences and Ialready booked it and I asked him if he was sure before I did. I guess Im wondering what would you do if you were in my place?