Need ADVICE!!! I DONT KNOW WHAT TO DO I NEED SUGGESTIONS!

So while my boyfriend was at work, I had found out his best friend more like a brother had passed away.. I instantly text him to tell him, because I thought he should know. I don’t really know how it feels to lose someone that you are very close to, I was really young when my mother passed away. I don’t really know how to comfort him and be there for him. He came home early from work. Any suggestions on what to do? I really need someone’s help. I have no family or friends to ask. He’s all I have. I don’t know if he’s sad or angry at the death of his brother. He doesn’t want to think about it, which I understand. I wouldn’t want to think about it either, so I’m guessing he doesn’t want to talk about it!