There is a security guard in the community who jokes when he sees me all day, which is very annoying.

A security guard jokes when he sees you all day, which shows that he likes your beauty. He wants to joke after seeing you. He can joke, which means he is trying to get close to you. If you think this person is ok, you can just tell him that we are not suitable and we can't be together, so just say it, and he will never play the same joke on you again.