Affection. A lot of guys don't get that the little things matter most to women.

Randomly grab her by the waist, push her up against the wall & kiss her.

Randomly grab her hand, drag her to the room & love on her, cuddle her.

Smother her with affection for while.
Most women, it'll drive them crazy.

Distance. Learning to have your own time. Do things you love. Don't lose yourself. Don't let your relationship status define you as an individual.

The thing with all that though,
is either you're giving too much or not giving enough. In time you learn to create a balance.
Not a routine but a language between the two of you that can't be misinterpreted.