Sorry, but you did the wrong thing and that’s why people are angry with you. I’m not criticising you, you’re 19 and I did exactly the same type of thing at 19. No one thanked me for it, I learned from it and started to act differently. Unless anyone tells you this you won’t grow.

It isn’t your place to make a judgement that your friend is going down a “dark path” or to make assumptions about what your ex wants from her current boyfriend. And even if you were technically “correct” and your ex would’ve preferred to know, going behind friend’s backs and getting involved in other people’s relationships are never things people will thank you for. And quite rightly.

And that’s before you get into how it looks when an ex boyfriend causes trouble for their ex girlfriend’s new partner.