He pressures me too much and I feel I can't get away from him.?

Literally every two minutes I get a message off him asking for food, saying he's tired, telling me to go turn his light on. I can't take it anymore and I don't know what to do? I try make things work. I buy him nice clothes, new food, play games with him and get him money! Nothing I do is ever enough for him. I just feel like he doesn't appreciate me:( I don't know what to do. He's so demanding and insensitive. He doesn't care if I'm doing something, he demands stuff immediately. Please help:(