The girl talked to him seriously, but she didn't talk to me seriously and laughed at me. Why?

No one can tell you anything about feelings. Sometimes we feel that our feelings are beautiful and romantic, but love without an ending should stop as soon as possible, because we all want to live a real life and don't waste our youth before we regret it. Rationality and sensibility need to be balanced. It's no big deal. It only starts when it's over. Maybe it will make you feel sad at first, but time is definitely a good medicine. Do what you should do, don't care about the temporary jam, I hope you can understand. Feelings without results have no meaning in themselves! Treat this relationship calmly and rationally, and think about this love from the perspective of your love.