I’m really upset about my boyfriend’s ex and I don’t know what to do (please read information below before answering)?

Anonymous
I’ve known his ex since I was a kid. We used to be friends until her humour (making fun of me all the time) was too much for me. She became rude and a bit of a bully. She’s also removed me off of some social media so she clearly didn’t want to continue being friends either. I was fine with that. Then when I started dating my boyfriend, she was shook because her “ex best friend” and ex boyfriend are dating. Like okay? Why do you care. I’ve never been okay with the fact that they still talk and are friends. I know my boyfriend will never leave me for her, he said he has no interest in getting back together with her and he only wants me. But I really want her to back off! I’ve always hated her, and the fact that she’s his ex, I hate her even more. And my boyfriend knows how much I hate her. Yet he won’t stop talking to her because she’s “his friend” and her boyfriend just broke up with her so she’s sad and needs support. Well I’m upset half the time, my boyfriend isn’t there for me. She can go talk to someone else. And apparently he goes to her for support when I’m not around. I’m his girlfriend? When will I NOT be around for support?
I am so miserable and upset. I want her to back off and I want him to stop talking to her. She keeps requesting to follow me and won’t stop either! She also says things like “Well I better leave before your girlfriend hates you like she hates me lol”. Like seriously. It’s like she’s trying to cause things. I noticed the other day that my boyfriend didn’t answer my text but he answered her which made me so mad. I’ve been so tempted to message her and just tell her to leave my boyfriend alone and I honestly want to tell my boyfriend “No more sex or anything like that until you cut communications with your ex”. I don’t care if a lot of people here think I’m being dramatic. This is who I am and my siblings and friends think I’m right. They all would be ticked too and wouldn’t want their SO texting their ex either.
How can I stop this?
I’m really upset about my boyfriend’s ex and I don’t know what to do (please read information below before answering)?
4 Opinion