I think she seems a little cold. What should I do?

This girl's reaction is normal. If she agrees as soon as she is invited, it will be troublesome. This girl is a good girl, reserved and reserved. I think you've only known her for more than ten days, so it's hard to make great progress. Actually, you don't have to worry too much. Take your time. Send her a few short messages every day to say hello, so that she can gradually deepen her affection for you and let her know that you always care about her. Maybe a few months later, I will make suggestions for playing again. I'm sure she will promise you then. In fact, there may be several reasons why she won't promise you. First, she doesn't know you well. Generally speaking, as a girl, I don't like going out with strangers, let alone boys. Second, she may belong to that kind of reserved girl, but she seems to have no feelings for you now. What is this? Only she knows ... anyway, such things as feelings are urgent. Be kind to others step by step! I believe your sincerity will definitely impress her! Wish you success!