I lost my little sister

On April 29 /2016... the lord took my 49 year old sister . In my eyes she will always be my little sister .... i feel like i let here down not being able to help and protect her like brothers are supposed to ...
She has been suffering with PHD for the last 3 years and her heart just could not take it anymore .... I thought i was a strong/courageous person ... but i could never be half the person she was ... Today at 1 o-clock i will see her for the last time before cremation and i am havng a REAL hard time dealing with this ...
Thanks