First day, tell her “I miss you already" and on the way home, buy her something you know she likes.

Next day, you call her first.

Third day, tell her not to cook tonight and buy her dinner, to spare her the effort

Fourth day, tell her you're a little busy, but the moment she called is a minute of comfort.

Fifth day, when she calls you up, tell her to get dressed for a nice night out together.

If you have kids, that's another episode.
Salam