School counselors in my experience (Which means I've only ever dealt with 2 in my life, and this does not apply to any other ones that I have not met. Don't hurt me.) are complete scumbags with literally no regard to the feelings of, or what's best for, the students that talk to them. And why should they? They get paid exactly the same, regardless of how many students they talk to or help, and are overbooked across several schools.
One of my friends was in high school was in a similar situation to yours, except that he spoke to the counselor about being insecure about other students making fun of him. She assumed that meant that he was angry at them and was going to murder them or something, and literally sent him to an insane asylum for kids against his and his parents will over the weekend. Even when his parents demanded him back, he wasn't allowed to leave until his next appointment with the counselor. They sued the school over it, but I'm not sure if they won or not. I know the kid, and he's really gentle, and was not even considering anything like that. I've had my own issues with them too, but uh... I think I've ranted enough. lol
Either way, be careful about her, and don't act rashly. Get your parents involved as much as possible, and don't let them make assumptions about what's going on in your head. Also if you actually are planning on making a list, please don't. :)