They are really horrible people. The female is his ex, and the male is her now fiance. Initially we would all get together every so often, but I quickly became uncomfortable being in the presence of an ex, knowing what her and my boyfriend once shared. I told my boyfriend this, said maybe I'd be able to deal with it down the road. He was disappointed, but I didn't think it was fair to me to be put in such an awkward position.

Moving onto the present...
These two have been giving my boyfriend the cold shoulder for months with no explanation. He would ask to get together, they declined. The ex deleted him from her facebook as a passively aggressive person would do. Yesterday my boyfriend sent a text to the guy asking if they would hang out, they said no. I'm unaware of the exact words that were exchanged, but my boyfriend asked what was going on, and they stated that they didn't want to hang out anymore due to my discomfort (strange - my discomfort showed itself when -I- was in her presence, not when my boyfriend was in the presence of her), that they weren't really friends anyway, and some other issues.

My boyfriend replied with a civil text, saying he understood, and that it's unfortunate they are no longer friends. Now at this point I'm not sure if he asked what the other issues were, or how that came about, but the guy responded with:
"We don't really like you anyway. You're kind of a tool."

I can't believe the callousness of these people. My boyfriend has been nothing but nice to them, never did anything hurtful to them, has tried to maintain a friendship, now this. How undeserving.

If they were decent people, instead of taking him off facebook and basically ignoring him, they should have just told him that the friendship was over. They were friends for years and have been through a lot. You don't treat a person like this.

And what's strange is the mention of their supposed concern for my feelings - what about concern for my boyfriend's feelings, who's being called names unjustly?

I just feel really bad for my boyfriend having to put up with this. It's one thing to end a years long friendship, it's another to have the other party insult you. My stomach has been racked with anxiety since this happened.