Clashing Personalities

So i just moved to vegas about a month and a half ago and until recently I was depressed because I didnt know anyone out here. I moved out here from AZ. I got a job at this great Cuban restaurant. I love everyone that I work with...well almost. I've started making friends at work, and I love them. They're great people. There is just one person that is a bit difficult. My manager. He's a cool guy but I think we have the same personalities so therefore we are always clashing. I just want to be able to get along and not argue. Its tiresome. It's difficult because he's so contradicting of himself. First he'll tell me to stop talking and do some work (always when the restaurant is empty and there is nothing to do) then when there is actually work that needs to get done and im hustlin' , he tells me to sit down, relax, and let the bussers take care of it because it's their job. Then tonight he asks me why im always staring at him? That its annoying. WHAT THE FUCK? Is he crazy? I told him I wasn't and I dont, that I was looking around because I was waiting for my food. He's insisting that im staring at him, so I just told him "Look, im not staring at you, im just looking around, im sorry if it seems like I am". I dont understand him, he's either bipolar or he's constantly stressed (which I dont blame him, because he's the only manager and works all day, 7 days a week). I just want to be able to stop all this. I love where I work and what I do and I get amazing tips! But I hate the bickering!
What should i do? What's more important to me? What do i want to deal with? Lately i just leave work all depressed and wanting to cry because of this issue. He's not just like that with me, he's like that with just about everyone..but there are certain that he gets on my case about that he sees the other servers doing and doesnt say a single thing. Its not that i want to please him but i dont want to keep whatever it is going on. I know I shouldn't take it personal because that's how he is but it's hard not to. I feel like nothing I do is good enough. I feel incompetent.