Quick semi-urgent question about honey
Honey lasts forever. Or almost forever. You'd be able to tell if it was bad (moldy or stinky), which is very rare. Taste the honey first - if it tastes OK, go ahead and use it in your dressing.
P.S. [Edited to add] If the honey has crystalized (turned solid), you can heat it gently in hot water or the microwave to return it to liquid form.