Please help me I’m really struggling

So I am a freshman in high school and I am in the visor he with a boy that I don’t like he isn’t nice to me and I’m not very nice to him either but it’s nothing really serious it’s just both of us making snippy jokes at each other but since he doesn’t like anyone in our advisory he made a meeting with our advisor and told her that I was bullying him so that he would be able to leave the advisory I’m not bullying him and he is employing me we just mutually don’t get along and we are both at fault I have apologized to him. For some reason I feel so guilty about this though and I haven’t been bullying him and he’s using that as an excuse to leave the advisory is stressing me out so much thinking that my advisor thinks that I’m bullying him when I’m not I also don’t want this to be a larger issue where I have to get called into the counselors office and talk to him and the counselor I just don’t know what to do and I feel so bad and I really wish I didn’t say all those things about him and I have apologized and he’s using this as an excuse to leave and I don’t like anyone in our advisory either and I want to leave but I can’t and I’m afraid to talk to my advisor because I’m afraid she’s going to be mad at me for being mean to him