High school is a pain and is draining me mentally.
I'm sorry to hear that. Why do you feel high school is a pain and is draining you mentally?
My grades are not improving and others are annoying me.
It is not good to be stressed out. The words of others should not get you down either, maybe you can see a therapist or the counselor.
No, there's no need for that. I can deal with it myself. I just need to work hard and get into a good college.
I know you think you can deal with it yourself, but you don't have to. Therapists and counsellors are trained to help in these types of situations, so I think talking to one would really benefit you.