All that “I feel your pain” stuff is bullshit and disrespectful. You can appreciate it, listen and support someone as best you can, but you can’t understand it. Depression is so personal and so unique to each of us that when you’re in its teeth, you think you invented it. You can understand your own, but that’s it. When you are severely depressed, it can be more isolating than anything else you have ever experienced. In trying to make someone understand, you can only speak in approximation. You are truly on your own.