Who is rlly insecure?

So I had a friend that was a girl like earlier this year and rn that I’m at school I see that my girlfriend texted a guy that I don’t know and I blocked him cus I don’t trust him and she said “it was my insecure bf” but the problem is that she didn’t want me talking to this one girl when all she was, was my friend you get me?
Who is rlly insecure?
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