You knew how it would affect me and my relationship and you still did it.

I'll have wounds that can never heal because you chose to let it happen.

Was your own heartbreak not enough? Why did you want me to hurt too? What did I do to deserve this? I did nothing but care for and support you and help you.

You are both to blame but still, you messaged him first.
You didn't shut it down when you knew how much it would hurt me.

You're a bad friend.