You certainly don't need to have someone in your life -- as someone who married late and has two kids now I sometimes look back on my long period of begin single with fondness -- but I would also recommend being very honest with yourself. Very few people are totally undesirable and expecting others to meet some predetermined standard is very common among people that don't interact socially very often (I speak from experience). While I'm lucky that my wife is very bright (and in many ways much smarter than me) the most important thing that she has given me is new perspectives on life and seeing that it's more important to be kind and helpful than smart.

It's very hard to see outside of our early conditioning without outside perspectives. We may have a vague sense that we might not have been given the best tools for social development (we may even be brutally aware of it), but having someone that has the skills that we are missing is often more important than that they have equal skills in areas we are strong in. Having a good partner can make you realize things about yourself and open you up to things that you never even realized were there.