My friend and I are currently in grad school. We met each other in undergrad and have talked online nearly everyday for the past 3 years. Right off the bat, he had pretty major depression and used to vent to me a lot. As he got to know me more, he learned a bit about me and every few months he tells me that he needs a break from me because my views are making him feel even more depressed/suicidal.

Today, the trigger point was when he asked me how often I idealize suicide, and I began talking about how my life was hell, how I hated my mother for bringing me here, and how I hated society for not giving me the special treatment I deserved.

My depressed friend thinks I severely over-exaggerate my problems, asking "is it really that bad?" until my venting became too much and he told me he needed to take a break from me. 

These are the things that made me call the suicide hotline: Being born with a peanut allergy and without smell. I consider myself a defective human because of these disabilities. Also, possibly getting a C on an exam; most of my suicide hotline calls have been my complaints about exams being too hard. 

I basically tried getting him to understand that my problems were serious. I told him my life was the worst possible hell I could imagine because due to my lack of smell, I have to put on deodorant every day and it makes my arm pits feel cold for a minute, and that he was so lucky that all he had to take was antidepressants instead. 

Basically, that was the last line before he just stopped talking to me and said he needed a break. What am I doing wrong? This is like the 3rd time this has happened.