somebody plz help me.

If আপনি and your friend are fighting i suggest আপনি sit her down and talk about it, find out how this got started and figure it out together.
However if she's threatening to beat আপনি up and your frightened that she will do, আপনি MUST tell your parents. Especially if your friend will actually hurt you.
But if she's just threatening আপনি over the internet অথবা on your phone, i wouldn't worry about it too much. Just block her number অথবা change numbers on your phone and ignore her.
If আপনি go to the same school try to stay away from her as much as possible. If আপনি sat পরবর্তি to her in class go see your teachers before the lesson starts and explain to them what's going on and ask that they place আপনি to sit somewhere else. This would also give আপনি the advantage of getting to know someone else and probably becoming their friend.
If this friend of yours is leaving আপনি alone at home, but bullying আপনি at school, আপনি MUST tell your headmaster/teacher অথবা another adult who will then act accordingly. If things don't get better and আপনি actually get hurt on school property দ্বারা this girl আপনি can take legal action against the school for negligence.
If this girl keeps coming onto আপনি at প্রথমপাতা and school and no one is paying attention, i know this may sound drastic but i suggest আপনি should go to the police and get a restraining order. However they will ask for proof that she's stalking and threatening you, so আপনি must keep any record of what she says অথবা does to you. If আপনি get cuts and bruises from her photograph them, if she says something to আপনি write it down in a notebook, keep text messages অথবা emails, and if আপনি can - tape any phone call she calls you.
But আপনি should try sort it out with her. Sit her down and find out the root of the problem. আপনি never know, if she turns up and আপনি both listen to each other and talk about your feelings আপনি could end up being best বন্ধু for life :)
Good luck hun.

Is she on fanpop? If yeah, then প্রতিবেদন her. If not, tell your mom and dad XD

When আপনি say আপনি are fighting, আপনি mean physically? Then আপনি should tell your parents ASAP.

There's no need to be too worried. আপনি started দ্বারা saying that she's your friend. So আপনি either are অথবা have been বন্ধু before. আপনি can easily make up with her if there is a true friendship in there. But if you're still worried, just make sure to lock your doors and windows just so আপনি will feel safe.

What about threatening her? That usually works. অথবা learn some moves, so that when you're fighting, আপনি can kick her balls.