Why does a girl talk to me every day, but she doesn't accept me?

It is possible that she didn't develop in Beijing after graduation, so she can't stay with you all the time. He doesn't want to make you sad. When she graduates, the top management will be very sad. So although she likes you now, she didn't promise you, just wanted to be friends with you all the time. When not together, she can at least say goodbye with a smile, but lovers are different. It's hard to say goodbye with a smile.

Another possibility is that she just regards you as a spare tire, just wants to have an affair with you and doesn't want your relationship to go further.

Suggestion: You can talk to her and ask her whether she likes you or not. If she doesn't say anything, you can pretend to ignore her and see his reaction. If she doesn't react much, it proves that he may just use you as a spare tire. You can also tell her that you like him and that you don't care that you can't be together forever, but after a period of time together, you will leave a good memory for each other instead of a deep regret.