I went to an elementary school where I got picked on alot. I know all about faking sick. I am 100% sure that he's bullshitting, possibly to get more attention from her (Like they don't spend disgusting amounts of time together already... at least he's getting a single next semester, maybe she'll be down there more often).
Would you call him on it? how would you call him on it? I don't think we have a thermometer.