I doubt you are imagining this. It sounds very painful and frustrating.
It’s very difficult to see ourselves as others see us. You might ask your counselor to talk with some of your teachers about their observations of your interactions with others. It may be that you are socially awkward in some way or that you have a way of making others uncomfortable without intending to or realizing it. Some more objective information might give you a clue about what you need to change.
It’s also possible at this point that you are so scared (understandably) of being socially isolated that you are in some way creating the very situation you fear. It is like a discouraged salesman who starts every sale by saying, “I know you don’t want to buy this but …” It sets up a negative dynamic. That’s just another guess. It may not apply to you.
I’m sorry that I can’t offer you more specific help. For that reason, I’m especially glad that you are seeing your school counselor. Do ask her to try to learn more about others’ impressions of you. That might lead to a better understanding of what you need to do to improve the situation.
I wish you well.