Give her a hug and tell her you love her no matter what. It's simple, but it will mean a lot.
Well you could start by telling her exactly what you have put in your question. We tend to take the love of family members for granted and there's certainly nothing wrong with just telling them how important they are to you. Even if she was hard faced about it, those words would stay with her, I promise you.
do all the things the folks say but you got a mind of your own and you are getting more of free thinker and got explore your self
Tell her you love her very much for who she is and having her in your life means a lot. Organise one day outing just the two of you like cinema, eating out or funfair, whatever you both like.