I am sure you will have a wonderful time. Beyond the common courtesies of behaviour just be yourself at all times - wysiwyg - what you see is what you get - very important. Don't act out of character to impress anybody, least of all your lady. The trouble with holidays is that, because they are special, almost like fantasies, people often behave so differently from their usual selves that their true personalities remain hidden. Put simply, it is next to impossible to make serious character assessments and decisions during exciting holidays.

Having said that, you mustn't be a wet blanket; there is so much to enjoy and experience and, should marriage result, the memories of those first times together are treasured for a lifetime. So give it all your best shot while remaining true to yourself at all times.