I have some "friends" in college who constantly mocks me, criticize me for every little thing throughout the day, uses me for their assignments (they don't do anything on their own). Anyways, I don't have problem if they want to copy my homework but they are so ungrateful. My bf asked me stop doing things for them but when I think about it, I fear that they may start to hate me. For which my bf says it doesn't matter what they feel or think but to me it does. I'm aware that they are toxic, my bf says that they are not just toxic, they are bullies. But I feel like I'm stuck with them forever.

I try to avoid college because of them. About bullying, I'm not sure because I've met people like them since childhood, it's not new. They dictate me what to do and what not to do. But I'm fed up now and I can't take it anymore. At the same time I don't want them to have negative opinion about me like she has changed or something like that. 
Would really appreciate if anyone could help me out here..

Thank you