I agree study can be really stressful, especially with time-management. I could understand how vulnerable how you might be feeling because it seems like your moods are changing. I can relate in a way because when I am feeling sad deep down with strangers around me, I hope no one can see it.
I remember when I had a falling out with my friends. I know how alone it feels to have no friends. It sucks when people leave you. But I have made other friends and you will too.
My parents are also against me seeking help, they think if I take medication that I am going crazy or question why repeatedly if I see the psychologist. So I can also understand your fear of seeking helo
You're allowed to see the GP and get a mental health plan, no matter how your parents feel. Good luck. Hope this helps?