Pick her up and pretend you're going to throw her in the pool. She'll scream but secretly, she'll love it. Hold her hand while you talk. Hold her hand while you drive. Just hold her hand. Tell her she looks pretty. Look her in the eyes when you talk to her. Protect her. Tell her stupid jokes. Tickle her, even when she says stop. When she starts swearing, tell her you love her. Let her fall asleep in your arms. Get her mad, then kiss her. Kiss her on the cheek. Kiss her on the forehead. Just kiss her. Let her wear your clothes. Go slow. Don't push anything. When you fall in love with her, TELL HER.
