It seems very hard to handle a girl but at the same time it's easy too. She doesn't demand the big things but just by small sweet gesture you can win over her. They are different so try unique and different ideas for them to feel them the sweetest girl.
Below is the list of some simple gesture by acting upon them you can be your girl's sweetest guy and I can bet that, no girl in the world may deny that:
Every girl dreams for a guy who makes her feel like a princess. He gives her chair first, open the door for her.
Sometimes you should surprise her with some gift and she'll remember this gesture for life -time.
Always listen to her whenever she want to say something because girls love to talk a lot so you should be a good listener.
Such little and sweet things matter a lot for her and it takes nothing in return. I am quite sure you will get more love back.
You too should get involve in her family as much she involves in yours. Love and care for her family just like you do yours.