Love the good manners and polite behavior of British gentlemen. Don't assume they want you to act completely the same way. British men are used to very uptight British women and love the wildness of American girls.
Expect to be called "duckie," "sweetie," "dear" and other nicknames that might be offensive to you if an American man called you these same names. These are normal and accepted signs of affection from a British date.
Look forward to seeing the wild side of your British date once you visit his apartment to "see his etchings." British men are reserved in public but love affection and romance in private.
Appreciate the fact that British men are loyal. They do enjoy flirting and looking at other women, but even if they stray, it's not because they don't care for you. British men want relationships to last, especially with American women, whom they feel are sexy and more fun to be with than British women.