Gf showed me a bad picture of her female friend, which is my colleague. Her friend is actually my friend too, well kinda of. She asked me not to show it to her or to anyone. Hell, she didn't even send it to me. I took a printscreen when she showed me it on skype through the "share screens" thingy. Her friend started teasing and threatening me in a playful way, so I showed the group where we were in the bad picture that I "stole" from my gf. I felt bad for betraying her trust and I told her. Than I apologized kinda of reluctantly. What would be the wisest thing to do? I kinda of was a retard both for breaking frame with her friend and for betraying the trust that was given to me by my girlfriend.