You should show you love someone rather then saying it. Words can be forgotten easier then actual physical motion. You should actually both say you love them, and show that you love them. Physical motions can be remembered easy than words. If someone were to receive a hug or a kiss, it would be remembered in detail. You would remember what place they kissed you at, what time of day, who kissed you. But in words you'll often forget who said what, where they said it, what time they said, where it was said.