If you like a girl, but you can’t find a topic when chatting with her, I suggest you do this:
1. Get to know girls better, pay attention to what girls like, and what their hobbies are. What, talk more about things she likes and cares about.
2. Pay attention to observation of life. In fact, many things around you can be used as topics for chatting, such as your circle of friends with her, anecdotes around you, food, TV dramas, entertainment, etc. If you pay attention to these things and master them, you can use these things as topics for chatting.
3. Enrich your knowledge. You need to enrich your knowledge. The richer your knowledge, the more topics you can chat about. For example, talking about the past and the present, world affairs, current news, etc. can all be used as topics for chatting.