* * * participation
According to each other's hobbies, you can finish a job with your girlfriend and accompany each other, such as running, shopping, going to the library, taking part in a competition and so on. And change the subject from this process.
Study together
Mood sharing
Don't just share "I ate", "I took a shower" and "I went to play ball", but share your feelings in the form of stories, such as "I met a great person at dinner today and he sat next to me. . . "So as to stimulate the curiosity of his girlfriend and continue the topic.
I hope the answer can inspire you and I hope it will be adopted.