<human>: Introduction:
So about 6 months ago (?) my bestfriend *lets call him Bob* [17 M]  dared me to send "cute" (Lots of hearts, relationship-like) messages to his ex *Britt*, just for the heck of it. Me and her continued this for a couple of weeks, and just carried on. I was enjoying myself, and seemed like she did too. 

This was all fun and jokes, but we started talking about all kinds of subjects. We talked ALOT. This wasnt very popular in Bob's eyes, so he told me I could talk to her as long as i avoided bringing her name up so often. Didnt think much of it at the time.

Havent really met her face too face yet. She sees me everywhere, but Bob is often around me, so she chooses to stay away. 

Problem:
Another good friend of mine is dating a friend of Britt. So Britt decided to invite me, my good friend and the girl hes dating out for a doubledate. 

Bob found this out and got really mad, saying that Im a "total fucking asshole" who defied his trust. Britt found out that Bob was pissed at me, so she dragged Bob's ass out into the hallway and bitched at him like crazy. 

This made him even more mad at me. Told me to delete her from facebook and never talk to her again. 

After a long discussion I deleted her, and said; If I have to choose, I will choose my friend of 11 years rather than a girl I dont know."
Didnt make things better

He said; Go on the date, that way everyone will be happy, Im mad at you no matter what you do, so you might as well just go.

Additional: 1,5 Years since the breakup. 
Their relationship lasted about a year or two.

Can you provide a brief overview of the text?
<bot>: Bestfriend hates me for considering going out on a date with a good friend of mine and his girl. Is it OK for me too meet her, or am I a total asshole for not understanding?