My girlfriend often complains that I have nothing to say when chatting with her. Help me think of some text messages to get rid of her.

This is an embarrassing question. I suggest you get to know her better. After mastering a certain situation, we should adopt the method of listening more and talking less. After you observe it for a period of time, see what topic she likes. When we meet again, we should stir up the topics she is interested in and let her give full play to them. You can be a "loyal" listener. When there are few topics, you can talk about another topic, so that two people will not be embarrassed to have nothing to say.