Hey there, I'm glad you're posting here. Because you can start to take a step towards getting better

I'm assuming by what you say that you're under 18?
Assuming you are, you do have to be careful about where you go for help, and also I think it's VERY important that you do go get someone to help you out. Depression is very very hard to deal with and so is cutting. You can fight it alone, but to be successful I think support is really needed.

You may consider going to a school counselor, ask them specifically what they can or can't tell your parents.

What is your mom like? I know in many cases parents are the last people someone would want to turn to. So I wonder, what your relationship with her is like?

I'm glad you're able to tell your friends by the way

You don't mean nothing.
You are worth getting better, you do means something and you can mean even more given time. Others don't define your worth. Your bf dumping you for your best friend... , but just because that happened does NOT EVER make you nothing.

I do agree with your friends, that you do need help. I'm soo glad that you've taken a first step by coming here.

Here's a few things to think about while you're figuring out where to go for help.

First, I want you to know that cutting can be addictive, and it can get worse. Catscratches are no good. I know that those don't seem all that bad, but really they do hurt, they are harming you and you need to stop. Also, the last thing I would want is that you ended up doing more. Cutting can be very hard to stop. You don't want to get to a point where you can't stop, you dont want to get to a point where the cuts are deep AND you can't stop. So PLEASE, please fight the urges as much as you can.

To fight the urges, is difficult.

Some things you can do, is if you can to get somewhere with people. Go hang out with friends, so that you can't cut because they're there with you.

If you can't do that, you need to try to make yourself think of something other than cutting. Distract like crazy.... do any fun thing you like to do, especially stuff that you can do with your hands or that engages your mind so you CAN'T think about it.

I don't know if you ever get cycling thoughts, like you can't stop thinking about wanting to cut?
If this happens, You need to stop the cycling thoughts. One way to do this is to think very hard about where you are NOW, describe where you are. NO EMOTIONS. List only facts.
an example: I am sitting on a couch. the couch is blue. there is a computer on my lap. There is a tv across the room. The walls are white. There is a lamp to my left, it is on.
Keep going until you're not thinking about cutting.

I hope this makes sense, take care of yourself