Saying "I Love You" Through A Text For The First Time

Long-distance relationship?
Long-distance relationship?
Long-distance relationship?
My girlfriend has been dating this guy for about six months and they haven't said those three special words to each other yet. However, he sent her a text saying "I love you" for the first time. Is this how it's done now ... through a text message? Shouldn't it be in person, face to face?