How to send short messages about sex to people on the Internet?

It's normal that you promised to make tea with him, although you didn't do anything. But that male online friend thinks that you promised him to come to his office so easily (only known him for two weeks, and you only promised to pick you up once), and the man will think that he invited you to tea, and then you readily agreed, which is a sexual hint.

This is a gradual process. For example, if you refuse a tea date, he won't have to talk to you at night.