Struggling with my course at university?

Hey im having a major problem! im struggling with my drama degree, im not getting the best grades, iv failed one class only though, but it costs around sixty pounds to repeat and its very difficult stuff i have to learn! i dont want to waste my money repeating it. I also dont get along with anyone in my class,they talk behind my back a lot and it reminds me of bein back in high school, their rather immature and bitchy. I want to do better next year but i dont know what to do, my whole first year at uni iv suffered depression, anxiety and a paranoid personality disorder, which stemmed from the death of a relative. My bf is starting an HND and hes doing something he loves, im doing drama but its turning out far too dificult for me. I have enjoyed the plays though and dont want to give up. any advice?