Explore the topic of cute things to say to your girlfriend
But make sure not to call her anything that is connected to heavy meal, like pork chop. She will think that you see her as fat and she will surely not see that as cute. Another category you can take your pick from is cute animal, like kitty cat. Again, make sure to be sensitive with your choice. She will more likely be offended if you call her a gerbil or anything from the rat family even though you may find the animal cute.