"My heart is broken. Even though my brother and I have had a complicated relationship, my love for him has never ever faded," Nick wrote on Instagram alongside a collection of photos featuring him and his little brother. "I have always held on to the hope that he would somehow, someday want to walk a healthy path and eventually find the help that he so desperately needed. Sometimes we want to blame someone or something for a loss, but the truth is that addiction and mental illness is the real villain here. I will miss my brother more than anyone will ever know. I love you Chizz. Now you can finally have the peace you could never find here on earth….I love you baby brother."