What do girls mean when they say they get bored when they see you?

Just kidding: girls say they are bored when they see you. Maybe she was just joking or teasing, but she wasn't really angry or upset. In this case, she may just be expressing a relaxed and humorous mood, so don't take it too seriously.

Expressing dissatisfaction "Girls say that they are annoyed when they see you, probably because they are dissatisfied or disgusted with your words, deeds or manners. For example, you may say or do something that makes her feel uncomfortable or offensive, or you often bother her or make her feel impatient.