Make sure you document the long hours and have proof of your productivity. I am one of the those people who implicitly trusts everyone and loathes documentation

Make sure you document the long hours and have proof of your productivity. I am one of the those people who implicitly trusts everyone and loathes documentation, and I learned my lessons the hard way. This proof will be useful to you if the situation gets worse and you're asked to back your claims up that you're working much more than him.