Besides, you've already had sex. Do you know how important a girl's first time is? She'll be scared, too. She'll be afraid that losing you will make her lose everything.
Third, although you have contact with the League branch secretary of your class because of your work needs, she misunderstood you. You should keep your distance. Like why did he want you to leave? In addition, if he is nice to you and you refuse, for example, having tea together, you can find an excuse to avoid it.
Fourth, you mentioned that your league secretary confessed to you, and you hesitated. May I take it that you are not firm enough? After all, you have had a relationship, and you are responsible for her. Girls really can't afford to get hurt. Men can have many firsts, but girls only have one!
I don't really understand it either. Analyze your specific situation and ensure that it is handled as soon as possible. You can't let that girl down.