Love is something of which most of us are totally unsure. That's why we like to be told that we are loved and why, when we aren't told enough, we start asking, "Do you love me?" We just aren't that sure and hearing it said reassures us—or almost does, because there is something cheapening in having to hear it so often and, maybe, in hearing it so often. The same thing goes, I think, for saying it: so often when we repeat the words "I love you" too often, we are just reassuring ourselves as well as others that we really do love them, perhaps because we really aren't so sure that we do.