I dont get it

So, i havent wanted to have sex lately because ive been stressed and have a lot going on... Im takin my daughter to chucky cheese tomorrow for her birthday just her and i. My boyfriend keeps making smart ass comments about me cheating on him or meeting some guy... I havent given him any reason to say that. We have been together almost a year.... Its very annoying that he says that!!! Just because i don't want sex, doesn't mean im getting it elsewhere.... Ugh..... Rant over...