I selfharm, help?
So I cut my leg really badly, its wide and it hasn't scared over even though I did it 2 days ago. I go to a boarding school and they know I selfharm so they said that if I do it again I will have to be expelled. My two closet friends know that I cut as well but I'm to scared to tell them, do you guys have suggestions

Go to your parents, and to the school, be honest about what you did, and ask if they can help with counseling and professional help

You need to looked at. Tell your parents and the school. Get some counseling

At this point only your parents with the help of a school counsellor can help you get the proper medical attention so please talk to them. I am surprised your school has NOT informed your parents of this incident.