I don't have much to add right now as I'm going through some difficult times with my own family. But I wanted to let you know that I understand the isolation part, the inability to talk to friends.
I handle this by trying to spread the **** out between my friends so no one person has to hear all of it. I'll talk to one friend about one part of it, another friend about another part of it. Eventually, I can get it all out of my system without over-burdening any single person. This way I don't have to "stuff down something."
I also try to lead into conversations by asking the friend how their life is going and trying to get a feel for whether or not they're in a good mental place to handle my own drama/negative emotions. If they're really struggling with something, I try my best to be sensitive to their situation in life, and go find another friend who isn't having a difficult time themselves if I need to.
And? You've always got us. We listen, and more importantly, we understand.