My friend always brags about her relationship. How do I get her to stop?

I honestly dont consider her as a friend anymore because of the things she's done to me. I thought it would be nice for me to hook her up with my boyfriend's friend. So when they dated, she wrote in a group chat (that included my boyfriend and his friends and their GFS/wives in it) that I was older than my boyfriend and that younger guys only want to have fun but her and her man know what they want. I'm 4 years older than my boyfriend but we click through gaming. She also added that her love isn't like a video game like me and my boyfriend. It really hurt me.

She literally goes quiet when she has problems with her boyfriend. But when he makes her happy, she would spam all the group chats I'm in with her, spamming about her boyfriend and how they're so good together. I'm not jealous but it's really annoying. And then when her boyfriend doesn't give her attention, she would go spam tag him in our group chats. She will nag him in front of his own friends as well.

It's hurtful that she sees me as a competition and she's done a lot more to me than I can put on here. Everyone else agrees they find her annoying but am only nice to respect the boyfriend.

I've tried muting the group chats she's in with me but sometimes they talk about important hangouts so I have to go read it. How do I get her to stop? I do feel like she has a narcissistic personality as well.

My friend always brags about her relationship. How do I get her to stop?
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