I need advice.. im 13 weeks pregnant with my second... I am always feeling nauseous ! and I'm just…

I need advice.. im 13 weeks pregnant with my second... I am always feeling nauseous ! and I'm just NOT in the mood most of the time. I get so annoyed when my boyfriend tries anything. I feel bad for him. but I just can't. I hate when he touches me because I feel so sick all the time. what can I tell him? what can I do to fix this ?