Don't tell your boss. You will (likely) have to work extra hard to learn how to act and what to do to be as good at your job as others (when it comes to keeping the guests happy), however, it is equally likely that you will far exceed your NT peers at other aspects of the job. Work hard to get through the people part of the job, and find the part of your job you know you will excel at (perhaps hypervigilance is a gift, or a calm state of mind in emergency situations); once you identify they part of the job at which you can excel, work as hard as you can to show your boss that you are better than the rest at this part of the job. This will secure your position, and perhaps even open up a position designed FOR you. Once you passed the probationary period, and your boss is comfortable with your work performance, perhaps approach your boss with a formal proposal, outlining how you are an asset because of your unique abilities, and how a few small adjustments to your job expectations could improve your performance even more.
You DO NOT have to disclose your diagnosis with your boss, and I would discourage you from doing so until the probationary period has lapsed.
This technique has helped me in more than one work place, and has been particularly affective in my most resent and current career of 8 years. I no longer am expected to answer telephones, partake in disciplinary meetings or hiring interviews with staff, other management team members do this part for me, and meetings have been made more structured and I am given time at the beginning of meetings to express my ideas and concerns so that I can focus on other's ideas during the meeting instead of thinking about what I need to say for the whole meeting and waiting for my time to speak, or interrupting at inappropriate times to divulge my ideas. I have just this year "came out" to my boss, and knowing what I bring to his company and understanding my unique skill set, he had no issue with my diagnosis and "coming out" has helped him and my other coworkers to understand and relate to me a lot better. They are very less frequently offended by me, which has always been an issue in the past.