\~Throwaway account here\~

&amp;#x200B;

For some backstory, I became really good friends with this guy (I'll call him 'A') and when he ends up getting into a relationship, I meet and befriend his new partner (I'll call them 'B'). Me and B actually hit things off very well and we became good friends, arguably had a better initial connection than what I had with A.   


A and B's relationship started getting rocky and they went through a year of getting back together and breaking up (probably like 3 times), and on the last time they broke up, I decided to sit down and have a serious talk about everything with A. A few conversations and a joint later, we were making out and exploring our sexual tension for the first time. We also cared about each other a lot, so we were exploring the possibility of a relationship; this was, however, behind friend B's back. Friend B caught wind that something was up, but didn't really say anything. Fast forward about a week later, me and A decided that a relationship couldn't be a thing and we decided to stop it. I immediately went to B and explained all the awkwardness and everything that had gone on. I recognized everything that I had done wrong and encouraged B to voice any concerns or hurts that they had, though B didn't really say much.   


About 3 days after that, I left on a plane for work and wasn't going to return home for about 6 months. Once I touch ground, I get a long, cruel, delusional message from friend B saying that I was scum (among other things) and that he couldn't believe that I lied to him, even though I sat him down and told him everything. Is there something that I should've or shouldn't have done? Cos I feel like I did everything that I should have, or that I would have wanted if this had happened to me.

&amp;#x200B;

AITA?