Aita for not recognising them?

hey ITA for pretending not to recognize my parents when they tried to reconnect I was raised mostly by my uncle and Aunt my older sister developed a serious illness when I was six and my parents decided that they couldn't care for both of us I guess so they kind of unceremoniously dumped me at my grandparents and my uncle took me in like didn't even explain to me what was going on just her going to go visit grand for a while and never picked me back up my grandparents and Uncle explained it later and they were

pretty livid at my parents I've seen my parents maybe five times since then and not at all for the last nine years I decided to stop having contact with them when I was 12 and since I was the only one reaching out all communication broke down it turned out okay I love my aunt and uncle and it turns out they can't have kids so they've always said I'm their Miracle kid I was just misrounded by the stork at first I was formally adopted by them when I turned 18. I wish it had been earlier but

there were some red tape things that would have made that really expensive and difficult I'm 21 now my sister passed away between Thanksgiving and Christmas and I made a trip back from school for the funeral but I stayed in the back and left