Dear Wanda,
Your age is a time of change: physical, emotional, and social. You are probably noticing some of those changes and your father is, too. Maybe your dad recognizes that you are acting in a more responsible way. Remember that other girls and boys your age are also growing up, so you're not alone. Because these changes sometimes happen very quickly—like maybe growing four inches in a year—you might be a little uncomfortable at first, which is very normal. In time, you'll get used to your changing body and feelings.