Question?

I don't understand anymore. My boyfriend of 3 years old constantly tells me that I'm everything, that I'm the only one, he loves me so much, etc. But when I ask for a simple talk because I feel like he doesn't appericate the things that I do to show my love. I'm only 20 years old, but he has me doing things I never imagine doing, you know? I cook, I clean and I support him throughout anything and everything that he needs or wants me to do, I do. But if I ask for a talk, maybe a 10 minute talk, his personality switches completely. He starts bashing me completely, telling me that I'm not everything and I'm annoying and etc. I've been so confused lately and heart broken, and I've been crying so much lately. It's like, I do whatever he needs me to do but I am not enough. Should I just put my foot down and step away for a while? Maybe, he's not ready for me and what I have to offer. I just don't want to waste my time anymore. I do love this man to death but it just seems I'm being walked all over.