Charlie surely you distances yourself a bit from adults when you were 16? Her head will be full of boys, make up, clothes, music, day dreaming and friends of the same age.
The teenage years are a special time - no longer a child, not yet a grown up. It's nothing personal, just a stage of her development which she will grow out of.
Our children and our grandchildren are ours to spoil and hold close for only a short time. Our oldest granddaughter, isn't the cuddly little innocent she was just two years ago - we noticed that the other day. She is much more worldly wise and serious. Change can be sad, but it is inevitable.
Be glad you were close. She doesn't love you any less. 