The Importance of Saying "I Love You"
Call me soppy if you must, but I am a big fan of those three little words. Of course, I don't want to hear them if they aren't genuine, but within a relationship I think a couple should say "I love you" as often as possible.
You don't have to say it with words all the time. Often, actions can do the talking. It's usually in the little things, not the grand gestures that feelings of love are most obvious.
Even so, hearing and saying the words are important too. I am one of those people who strongly believes that you should always let a person know you love them whenever you really feel it and not just when you want something! :p