You might have an image problem. You lack confidence in your natural looks. Your beauty is skin deep and thus you feel insecure. This is why you dream of being more attractive.
Becoming happier in real life, does not depend on being more attractive. If you have confidence in yourself and display positive energy, you’ll be a beacon of attraction.
This type of dream alerts you to a theme you carry. You can try to change the way you think, by slowing making yourself think positive and then behave positively.