Kiss her neck
Hold her hand
Let hugging her turn into holding her
Be patient when she's at her worst
Tell her when she's at her best
Take pictures of her
Whisper in her ear
Answer when she calls
Listen to her feelings
Be around for the small things
Make sure she knows you want her around
Make her laugh
Don't magnify her weaknesses. She knows what they are. She's far more aware of them than you are. You see them, you deal with them, she owns them. She carries them. She lives them.
Love those parts too.