Do you love this man? Is he kind, caring, considerate, honest... To me the resounding answer to these questions is undoubtedly "YES!" Is there a magic spark between you that you have seldom, if ever, felt before, physically and intellectually? Having read many of your posts, the answer to that seems to be "YES" too.
Can you agree to disagree? - Is this the sticking point? Is it really worth throwing away one of the best, if not THE best relationship you have ever had, because of an argument? Or has the argument been brewing for some time? I do NOT want you to let yourself down, to sabotage yourself and your happiness forever after. You might regret it for the rest of your life. There are a million and one ways to say sorry, to explain why you felt it was justified to have an argument, from sending him a sorry card, an email, an invite to a meal, to your bed, whatever, it's entirely up to you, but please don't sabotage your future happiness.
If you don't go on that cruise with him, he will never forgive you, because it's an insult and shows you don't love him as much as he loves you, and the relationship will be finished.