I remember going through this with a friend who's dad had just died of cancer. Of course, I was very supportive and would talk with her every day. Eventually, it was getting pretty heavy for me and I ran out of things to say. So what did I do? Tell her I couldn't take it anymore? No of course not. I just endured and tried to be as supportive as possible. It took a while but eventually, she got better. Talking with her was pretty depressing for me and it was deffs affecting me but I knew this was one of those times where you're gonna have to sacrifice your mental for theirs.