The question isn't "Is there someone out there that's right for me?"
It should be (and usually is) "Is there someone out there who I am right for?"
I certainly believe there's more than one person out there for each of us, but too often I think people get wrapped up in what they themselves are looking for in a potential mate, sometimes to the point of disregarding another all-too important factor: Whether or not they themselves are what someone else might be looking for or interested in.
That might sound harsh, and in some ways, it should be. In other ways, of course, it shouldn't. You shouldn't change yourself 100% to please someone else, but at the same time you need to be cognizant of yourself, your quirks, your issues, your pros and cons, and honestly ask yourself if these are things that make you attractive to your potential date. If not, then you should focus on people who will be attracted to them.