I know this question was asked about two years ago and you probably have already figured it out by now but I wanted to add this to the discussion for future owners of pet rabbits trying to figure out what sex their rabbit was. I recently got my first bunny about a month ago and in the place where I got the rabbit they told me it was a boy but I looked in the internet and it didn't seem quite right so we took the bunny with veterinarian that specializes in bunnies and he told us it was a girl. By the image you posted it looks like your rabbit is a girl. All rabbits kinda look the same dow there. They both have a protuberance. The difference is that one is forward out with a tiny hole and the other has a slit. On the image you posted, you can appreciate a tiny slit that goes through the end. I don't know if you can see it. I recommend that you take a look at this webpage:
http://www.pet-informed-veterinary-advice-online.com/sexing-rabbits.html
It helped me tons to visually understand the difference specially the part where they examine the males penises.
Hope it helped!