There's more than one way to make her happier by talking to a girl, but I can give you a few tips
1.Do what she likes: Get to know her interests and hobbies, start with her topic, and make her feel that you and she have something in common. For example, if she likes **, you can talk to her about a singer or band she likes. If she loves to travel, you can share some places you've been to or invite her to plan your next trip together.
2.Listening: It is very important for girls to feel respected and valued. Listen to her thoughts and feelings and let her know that you care about her. Girls usually like to talk about their experiences and stories, so when she speaks, try to let her finish without interrupting her. At the same time, give positive feedback and let her know that you are listening to her.
3.Compliments: Moderate compliments can make people feel happy and confident. You can compliment her on her appearance, personality, or a particular skill. For example, "You look so beautiful today!" Or, "Your smile is really warm." "But be careful with moderation and don't overdo it, or it might make her feel uncomfortable.
4.Humor: Proper humor can ease tension and make chatting more interesting. You can try something light-hearted and humorous, but be careful to keep the humor down and don't let the humor turn into a joke or a bad joke.
5.Care: Let her know that you care about her and ask questions about her life, work, family, friends, etc. This will make her feel that you are someone who cares about her. Remember, these are just some basic suggestions, everyone is unique, and the most important thing is to find the right topic and communication style for both of you.
Hope these suggestions help you! If you have any further questions, feel free to ask.