(3) No one else
You should never try to be someone else just to impress a girl. Only someone who can accept youas you are, in your character and can lead you to prosperity.
(4) Be good friends
Try to be friends who can say anything openly. She should not have to think twice before talking to you. Give them the space and confidence to say anything openly.
(5) Aim only for her good
Just wish that she could be happy and at peace wherever she is. That good will surely be returned as a result of karma.
If all of tehse go the way they are suposed to, she will know that you are the one for her.