How can I stop someone from hurting me when they don't care about my feelings?

Sometimes the best thing to do in this situation is to cut out the individuals that bringing you down. It's better to surround yourself with loving and supporting people

If people refuse to look at you in a new light and they can only see you for what you were, only see you for the mistakes you've made, if they don't realize that you are not your mistakes, then they have to go.

You need to ignore them and get them out your life. Those are the type of people who deserve to be alone.

Try and take time away from them. Step back from the situation if they don't care about your feelings why are you putting so much effort in? Alternatively you could just tell them how they are making you feel.

hurt them first, mug them off before they have chance to you, i know how hard it is ive been there, but youve gotta stay strong and realise he doesnt care so dont bother it will be so hard but it only gets easier

Don't take what they say personally. If someone doesn't care about your feelings, it is because something is happening in their life, not because something is wrong with you.

You can directly communicate to them what they may do that hurts you. They may not realize what hurts you alone, you may need to directly show them or tell them and help them learn to not do that.

If a problem between two people can't be solve by themselves alone, it's usually a good idea to reach to other to help. A mediator could help you explain to the person hurting you how much it hurts you and your actual feelings. It isn't something bad to need help. It's also important to be able to identify when they are hurting us on purpose, no one deserves to be abused nor physically nor verbally and stepping out, knowing when to step out, of those situation, is really important.

by telling that person that their not worth your time, that you know to many people to hurt me because eventually someone will find out.

If someone doesn't care about your feelings then there's a very high chance that they won't care about the fact that you feel hurt, so there's probably not much you can do. It's possible that you may be mistaken and that in fact, this person may care about you and may be unaware that they're hurting your feelings, so in case of this scenario it may be a good idea to explain to the person how you feel and what you would like to change. After you have talked to the person give them a chance to prove that they care and if they don't then it may be wise to think about cutting this person out of your life or at least limiting contact with them.