was i wrong to get annoyed?

me and my best friend had a number of arguments a huge arguement last term and fell out. he had told me before the big argument that he nearly quit uni. his dad had just had a non fatal heart attack and his sister was bulimic and his brother was suicidal. i was concerned that he was taking too much out of himself by going to the gym twice a day and then swimming in the evening...i was worried about him.

he said that he could do whatever he wanted and that it was none of my business. i was angry at this and in my anger i said i did not want to be his friend anymore. i did not mean this but he was hurt by this. we have not been friends since. we live together. then a few days ago we had another argument about why we fell out. he said that i was the sole reason why he nearly quit uni. i could not believe this as there were more serious factors that were affecting him than the silly arguments we had.

i got so upset by this. my dad said that he was deliberately trying to make me feel bad but that he was wrong to blame me. i do try to look out for him to this day. Today he then annoyed me because instead of topping up electricity he went to the library. i got so annoyed. he said ' i don't have to do jacks**t. what are you gonna do about? i then replied i would give him a thump.

he then got so pissed off because i 'threatened' him and says we're through. however, he made me feel awful all week and the few weeks before.