this is very well said, the single biggest determent of a startups success is product/market fit, not team (i.e co-founder)

(see:The Only thing that Matters: http://blog.pmarca.com/2007/06/the-pmarca-gu-2.html).

If you've got a solid idea you need to push it forward, not having a perfect co-founder right away is a lame "go or no go" decider.

Pitch constantly, get out of your apartment, and scour your networks for co-founder prospects, sooner or later you going to cross paths with someone that believes in your vision and has skills/experience/connections that will add significant value to your business.

To me, its go forward and keep things moving - and be aware that this needs to be bigger than you and teammates help you achieve that.