<human>: Condense the text into a few key points

Sorry there's a lot of names in the title. Basically, my girlfriend and her best friend have been close for a very long time, since they were little. My girlfriend is white and her best friend is black, and my understanding is that they didn't spend too much time with her friend's family, but they were definitely familiar with each other.

I think the biggest source of pain for my girl is seeing her best friend hurting so badly after losing her brother and knowing she's helpless, meanwhile I feel the same way because I don't know how to help my girlfriend. She called me crying and I only met the young man who died a couple times, so I can't say I was close with him (though he was a good dude). I knew his older brother better, because he was my year in middle/high school and I had a few classes with him, but that's irrelevant.

Anyway I know this is super vague but I don't know what my job is here - how do I offer support for my girlfriend? Like I said I don't think she knew him very well but she cares deeply for her best friend.
<bot>: Girlfriend's best friend's brother died, she's taking it really hard, I don't know what to do or how to help. I didn't know him well. What's my next step?