Family passing

Agnes
So I recently posted about a guy I had been with for 2 years (Chad), we broke up, I ended up dating a guy he worked with but was family friends with as well (Dan), then Chad and I started hanging out again, and then when I tried to talk to him the other day he said some not so nice things. And unfortunately I know that's how he is, he has ADHD and a really bad anger issue. He is a good guy and he has a really big heart he just doesn't know how to use it and accept people trying to help him. He has an unfortunate luck issue, since he was little bad things had always happened to him and people always look back on that and don't give him chances to prove he's not bad because of everything from his past. Anyways, the day after he said those things, he texted me saying he doesn't know if I cared but his grandpa wasn't gonna last another day (being as close as we were, I knew his family very well. I was included in them.. His mom used to call me her daughter and say Chad was just there, his brother used to say he loved me and thought I was awesome. I lost all my grandparents at a young age and when the whole family and I had gone to Michigan on a trip they told me how they were my grandparents to and they loved me as well.) now I didn't get much time with Pappap (as they called him), also not that I didn't because Chad used to go on so many trips just with Pappap to Tennessee and I had gone with as well once. Also, everyone would go up to Wisconsin to their campsite in the summer time every weekend and when I had gone one time, Chad and I got into a fight but we still slept in the same bed, I woke up early and didn't want to stay next to him so I went by the fire and sat with Pappap just talking about nothing but we made conversation for like an hour because no one was awake. And I know Chad is so broken up about this because he spent so much time with him. Then the next morning he texted me saying he passed, just got to the hospital and that he'd text me later... He hasn't but I'm not worried about that, I'm just worried about him... I want to be there for him but I don't know what to do... And then there's still what he said, but he's said things in fits of anger, he just turns into someone else and I know it's no excuse but I know he's a good guy after all the time we've been together...