Long distance relationship question...?

I'm dating someone in another state. We used to talk/text all the time. He's having a really stressful time because his grandfather was put in hospice, the family is fighting and apparently more focused on fighting than being there for his grandfather. Needless to say, a lot of the responsibility is resting on him, to take care of his grandfather in his last few days. I get that that must be hard to deal with. I myself, and dealing with a lot of stress with my family. I used to talk to him about it, and he would listen, make me laugh etc. Well, with all the grandfather dealings, he doesn't call, text or anything. He says it's a very tough time for him right now, and that he has to put me on the back burner. He just doesn't have the will power to want to talk to anyone. He has an "eff the world" attitude towards everything. He says that I'm the one he wants to be with, but he's stressed to the max. Is this normal? I'm the kind of person that when I'm stressed, I want to talk to people I care about. I just feel like it's selfish of him, but then I think that maybe I'm selfish to think the way I am given his situation. Should I sacrifice not being able to share my ups and downs with the person I care about, because he doesn't feel like talking? Hoping someone can help shed some light!