How do u get someone to stop texting you?!?

You can call your cell provider and have the number blocked, which would be easier than changing your number. If the texts turn threatening you can file a harment complaint. It sounds like she just needs a friend. Maybe try telling her that she needs to calm down on the texting. Tell her that you have a text limit and shes pushing you over the edge and that you're going to get in trouble. Talk to your mom or dad about it too, parents usually have some aged advice about this stuff!