Please give me some advice. How should I continue?

Direction? Actually, talking to her all the time is very simple. You have to pretend that it doesn't mean anything to her, and then you have to make her feel that you are very close and gradually become good. But you should be vague, that is to say, be a friend, and then do something for her from time to time to make her a little moved. And her girlfriend is a good start. You have to bribe her first to get a chance. Be sure to show up when she is unhappy, depressed and hurt, and be vague, because that is your best chance, and you will always be like this. She will come back to her soon. Be careful with her friends, don't let her think you are treating his friends. . . It is best to find someone who is close to you to seduce his friend, and then you will have an excuse to get close to her. Hehe, I wish you an early success!