I had to vent, I am just broken hearted by this

My FP has BPD, and for the majority of our relationship he had not kept friends due to the pain of rejection. I had a lot of rejection in my life as well so I suppose I did the same. 

A few months ago he made these friends and they spoke almost everyday since and I was so happy because they seemed to genuinely care and at times looked up to him.

I dont know exactly what happened but today 2 of his friends started a fight, from what it seems, they will absolutely regret this later as they have basically burnt their bridge to one of the greatest people ive ever met. 

I am on break at work and when I called my FP, he sounded so sad. I want to absolutely verbally ruin these people for how they have treated him. (I hate confrontation so this is a very big emotion for me) 

I know this is crazy, but it isnt the first time this has happened: but I had a dream last night about one of the 2 friends like a preminition. I dont know why but it happens on occasion perhaps i subcontiously pick up on something anf it manafests idk i feel crazy when it happens but i know better than not to have said something. maybe had i done so he wouldnt be so sad and hurt, he could have guarded himself more... idk

I just want to make the pain go away, I hate that he is suffering and I hate that I can not do anything at all to make it better.