Lost elderly cat pls help

UPDATE! he is no longer missing. he had been admitted to a shelter 5 days ago and i found him on their website. im very sad about how this whole thing played out but i am SO HAPPY he is back! he is in my care now for good. I know this probably isnt the place for this but please dont take this down. I am desperate. My cat is probably 9 years old now and he is sick. Due to recent family issues I now live with my dad. My mother kept care of my cat and I just found out through my brother that my cat Frodo has ran away around three weeks ago. They did not try to find him. He has been with me through everything. I am so distraught and heartbroken. He ran away in the Fern Creek area! Please let me know if you see him. Even if he is dead. I just need closure. Please help.