Finding a co-founder is probably harder than finding a life time soul-mate. Unless the union between you and your co-founder feels 100% natural don't even try it. I say that it is better to be alone than to be in bad company. In this case you might as well start the journey alone, if you happen to find a great co-founder along the way great, if not, continue the journey alone. To advise somebody to not start a company until you find a co-founder is bad advise. Good if you have one, not terribly bad if you don't.