More than a year ago, I had an issue with a friend who was literally having the worst year of her life. She'd had deaths in her family of origin. Her son was having behavioral issues. She resented her husband. Work had always been stressful for her, but her office situation was getting steadily worse.
Friend had been told by her doctor that therapy and antidepressants would be a good idea, but she refused to do either. I served a frequent "dumping ground" for her problems. I figured a good friend would listen and try to make her feel better. But it put me in a no-win situation. If I tried to comfort her with humor and platitudes, she snapped at me that I was patronizing her. That I couldn't possibly understand how much pain she was in because my life was so easy. She needed REAL advice. So when she talked about leaving her husband for some pretty arbitrary reasons and I told her she needed to get some perspective before she did something rash, she accused me of being a bad friend, being on his side, not supporting her. So I tried JUST listening, not saying anything, and she snapped at me for not being focused on her problems when she needed me.
When I started objecting to her 1) using me as a dumping ground for her problems, adding to my stress and leaving no room in our relationship for actual friendship. And 2) speaking cruelly to me no matter how I responded to her problems, she used her stress as an excuse and once again, told me I couldn't possibly understand because my life was so easy.
I refused to accept "your life is just so easy" as an excuse. I knew she was having a bad time, but I didn't deserve the things she was saying to me. Saying I deserved better made her angrier, so eventually, I just gave up. I needed some breathing room before I said something I REALLY regretted. I told her not to contact me for a month. And after the month, she never bothered contacting me again. I am sad that I lost a friendship that meant a lot to me, but people change. Sometimes, it's not worth holding on to a relationship, when the person you're friends with is long gone and replaced by an angry, abusive jerk.