Honestly speaking, it’s to not act out of the ordinary and constantly be real to yourself, truth is the baseline in all relationships, and for that, you need to be comfortable in your own skin when you’re around her. Girls want guys that are just always themselves. Also be sure to be more attentive, girls, are species that require a lot of listening, when they have problems, you don’t necessarily have to solve them, you just have to be there to support her. The fact that you were there for her is more important than anything else. NEVER try to impose your opinions on her, treat her as a friend and equal, not some follower or superior.