I'm scared if I tell someone I self harm, they'll think I want to commit suicide and send me to the hospital. Could this happen?

I don't self-injure ("cut") but I am an admin of a board which supports people who do. My over-riding impression from that experience is that if you tell a health professional that you self-injure s/he will not send you to a hospital against your wishes. Suicidal and self-injury are very different things. A health professional should be able to listen to you and offer you suggestions about self-injury but will not compel you to go to hospital unless s/he judges that you at risk of suicide.

It has definitely happened to me before, so you can plan out what you are going to say before you tell them. Make sure to include that you are not suicidal, and try your best to explain why you are self harming. Communication is key.

It would be normal for the person to be worried, especially if they love you. Usually people don't know much about self-harm, mainly because it's still something that's not being openly discussed enough. Because of this they may misunderstand. Remember also that they feel involved and are worried about loosing you, which does not really help to stay calm and lucid. What is important is that you reassure them and talk thoroughly about your problem. Stay calm and make them understand that you are telling them this because you want to be helped. Also, if you think they don't know much about self-harm, consider giving them something - a book, a website, etc - that explains well what it is and why people act that way.

It could. You have to be clear about it and explain it. Not all self-harmers want to commit suicide, it's really just a way for them to cope with feelings. You just have to explain it to them.

It shouldn't. Self harming and suicide are very different things thats too often get linked together. People use self harm as a coping mechanism, they just need to be led in a better direction.

It can happen, but most of the time, people will ask questions first. If they think you're suicidal, then they might ask you. If they think so, and don't ask, then they might...

By telling someone what you're going through, you're showing you know it's a problem and that means you'll be able to get better

Honestly, it could happen. That is because they are unsure as to how to deal with the situation at hand and are just worried about your well-being. I feel like the reason behind self-harm is never a positive one, so getting some help could be very beneficial.

You could see a school counsellor about it or your parents, they could always help and supports you.

Yes, it could happen. However you have to think of it in their perspective. If they are scared your safe being they will. It really just depends on how you bring it up. After, ask yourself why it is you need to self harm