Do you think my boss is ripping me off?

Technically, if you are working overtime, it's overtime on HOURLY pay. If you are salary, there is no limit. Salary pay is what covers your employer's butt. IF however, your pay at present is based on HOURLY wages, then you should probably talk with the BBB. Obviously, HR at your workplace isn't going to do anything on your behalf, and sad to say, that's becoming more normal. Unfortunately, the job market is slim enough that employer's aren't worried about over working their employee's because in the end, if the employee grouses too loudly, they can find a way to let the employee go and find a more desperate person willing to work just as hard. Even contacting the BBB however, could put you at risk. It is not supposed to, as that goes against ethics in the workplace, but I've seen it happen many times. If you can't find resolution with your boss, then I'd suggest dropping down to the bare minimum hours of what you need to do and just work like the rest of your co-workers. Sometimes, reaching your full potential isn't what is healthy for you when it comes to your job. This simply because companies see that and some are just slimy enough to take that to their advantage.