How Can I Deal With A Super Annoying Co-Worker?

Hi. I work at a small retail business here in the San Francisco Bay Area. It's a great job and very fun. I've gotten to know most of the neighborhood and the people are very nice. There's only one problem. I have a very annoying co-worker. The guy is 55 years old. He was a very nice guy when I met him, but now he has turned into a complete idiot. The guy repeatedly makes annoying comments and always tries to do less work (So I have to do more). I try to stay as far as possible from him, but he always comes around and starts telling me what to do. Sometimes he'll yell at me, which really makes me mad. My head starts to spin sometimes. That's how mad he makes me. I've talked to the owner and he told me to stay away from him and handle the problem on our own since its between us. He repeatedly tells me to do his work. Most of the times I do it, but the guy can never be happy. He always brags about how he's the best and always tries to criticize me. I have asked him (super nicely) to stop annoying me. He doesn't stop. I've yelled at him to stop annoying me. The guy STILL doesn't stop. I've been working with him for 6 years now. I've learned the best way to prevent an argument is just, simply ignore him. But sometimes ignoring him won't work because he'll be yelling at me and I just can't handle it and I'll explode and tell him to leave me alone, shut up, or do his work. I have never called that man a bad word. In fact, I call him uncle to respect him. But he takes advantage of my respect and starts acting like he's the boss and wants me to do his work. I don't want to quit this job because I like doing it and it's very fun, so that is not a choice for me. I just wanted some ideas on how to deal with this guy. Thanks.