help me deal with harassment and bullying from an ex friend

i have been best friends with my cousins for more than 10yrs. i truly believed they loved me at some point, but this love eventually turned into resentment after starting therapy and learning about boundaries / people pleasing.

i used to say yes to everything they asked, but then i started prioritizing myself, and my needs where i would only say yes if the request matches those needs. i have no clue when they have started resenting me, but 1 day they asked me for a huge request which i did say yes to but asked them to wait. i got a call from one of them that is related to this request , and she was being extremely rude but didn’t think much of it since she was going through finals, and thought she was just stressed.

i called the other sister and asked her to please calm her down, bc i didn’t like her tone. suddenly, they went off at me and started yelling at me and getting real disrespectful. i didn’t get disrespectful back, but i did cut them off and blocked both of them.

now i’m dealing with bullying and harassment on twitter !!! one of them keeps making fun of all my insecurities. she even mocked about the night me and my DOG got abused by my uncle / praying that my dog dies ???!!!

it keeps getting under my skin and filling me up with anger because i never thought it would ever get this bad. it hurts me so much. i even reached out to one of them, and they just laughed and started mocking me even further.

i don’t understand what’s going on, or how to let it not hurt me this bad.