People mostly feel (and give) affection in one of five main ways, according to Dr. Gary Chapman, author of best-selling book "The Five Love Languages." Chapman defines the five love languages as physical touch, words of affirmation, acts of service, quality time and gifts. He advocates communicating your feelings for your partner using the language she most identifies with. You can tell her "I love you," "You're so beautiful" or other words of affirmation 100 times a day, but if her language is physical touch, she's not going to feel the magnitude of what you're trying to communicate. A hug and kiss when she walks in the door or a foot rub while watching a movie probably will go further in making her feel cherished and close to you. (And don't forget to let her know your own love language.)
A big part of a successful relationship is to show your girl you get her. For example, don't keep giving her roses if she's made numerous comments that wildflowers are her favorite. If spending quality time together is big for her, say yes to her invitations to go on walks, watch the sunset or turn off the TV at dinner and talk instead. If you don't, no matter what you do, she probably won't feel very loved or understood.