My Brother Died When I Was 19 ( 7 Years

My brother died when I was 19 ( 7 years ago) I had to give him cpr in which it failed he was 14 I turned to drugs but then sorted my life out I had a good relationship with my mum and stepdad then one night mum came in yelling at me in bed for no apparent reason kicked me out of home in which I ran to the only person who would take me in my nan a month later I went home to get my stuff mum would not talk to me or even look at me they took my keys off me and I went on my way a few months go by I go to go home and the house was sold they moved to another state and left me to fend for myself 7 years later I haven't spoken to my mum and I still have the feeling that somehow it's my fault this all happened I can't talk to anyone because I can't relate to anyone about this