Why does this girl kept ragging on me for dating my ex boyfriend?

My ex and I only dated for three months and it didn’t work out. Well. Nobody felt bad for me because I knew how the guy was. The thing that was messed up was it was a friend’s ex boyfriend. I know, messed up. She dated him two years before we started dating him. She noticed that he was flirting with me. Three months prior to us dating, he’s been messaging me but I wasn’t so sure because my friend dating him. I didn’t message back right away. for the first three weeks. My friend encouraged me to talk to him. I told her over and over I can’t because it’s going against girl code. She said she’s happier with her boyfriend and she’s OVER her ex. She encouraged me to take a chance. I started to talk to him. Then a while later, we dated. But he was a jerk, cheated on me and we broke up. This other girl a few months later kept ragging on me about dating him. She be like, “I don’t understand how a close friend would be okay with her friend dating her ex boyfriend.” Or “Someone would be an expert on dating a friend’s EX FRIEND.” She kept reminding me and she still does it. I told her, “Okay STOP! I get it. You don’t keep to rag on me so much about it. You’re never going to let me live it down are you?” She quickly shooter, “No I’m not! And I’m not letting you! You should not have dated him! I’m surprised (her name) was okay with it but I would NEVER be okay with it. Honestly I would have ended the friendship with you.”

I told her I considered her feelings and she was okay with it, she cut me off and said, “And you believed her? Don’t be so naive! No wonder autistic people have trouble seeing the realities of the real world, no offense. It doesn’t matter, you still broke the girl code. I can’t even look at you.” And she got up and walked off. What’s her problem?

Why does this girl kept ragging on me for dating my ex boyfriend?
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