my vacation with friends

I am truly lost at this point. Although I went for a vacation for three days and two nights with my friends. I still feel a bit lost. I did like the vacation, loved the beach, the company and also the adventure. I had motion sickness while I was in the boat, at first I thought it was because I was tired, but, it was the same through out most of the boat rides. I didn't want to gross anyone out with puking so I had to make my brain,ear and body stable. It got to a point where I could still feel the boat shaking when I was on the bed trying to sleep. It was our first trip together and I hope it is not the last.