I’m trying to figure things out

So i’ve been dating this guy for awhile now and things were great we’re the best of friends and we’re happy as can be. All of a sudden a ton of stressful life events begin happening to him. involving his whole family and work. just over and over bad things are flying at him. For awhile we were still fine afterwards and then all of a sudden he slowly stopped wanting to hangout as much and stopped wanting to have sex and he stopped talking about our future. And anytime I ask him like does he not want to be with me anymore he says he does. I try my best to be there for him because I know all of these life events happening are no fun. but I dont understand why he’s taking it out on our relationship