Its only like a semester or 2 more depending on what your second major is and if you want to go to summer school or not
If you are only talking about psychology, I'm sorry I bothered to reply. (and you must have skimmed the human relations part) Having said that, having a masters in psychology, sociology, history, and other similar fields in the humanities is a major plus in getting a job, depending on what you are looking to do. The degree can be more important than what it is in. Crazy, but true. Of course, you aren't interested in that. I personally know people in state government making 6 figure incomes with degrees like those I mentioned, which got their foot in the door. I know making 6 figures with a masters in psychology or sociology isn't attractive, and not of interest to a lot of people. Such is life.
No, you don't. Get something that will be marketable, even if it means doubling. For example, a double major in business management and psychology would be a strong educational background to move towards an HR Director position.