Have lunch with her. Why do girls laugh when I tell a joke casually? Do girls have a crush on me?

It must be like this! First of all, girls won't have lunch with you if they don't like you. Secondly, if you tell a joke casually, she will be very happy. You know, no one's jokes are that low. Only she likes you and has a good impression on you. Even if you don't tell jokes, her heart is full of joy, which is naturally reflected in her face and her expression is quite happy. If you like this girl, get along with her. In love, it is a happy thing that men and women can like each other.