The easy answer: find another co-founder-- one who is as passionate about your idea as you are. Of course, this may not really be all that easy.

Which leads to the difficult question: what's there to love about your idea? I'm sure there are many of us reading this who are saying to themselves, "Another survey widget? Ho hum." To which you reply: "Yes, but this one is different. This one does X."

This "X", of course, is your secret sauce. Your "unique value proposition."

Now, if you don't know what X is, then figuring that out is what you need to be working on. It's going to be hard to attract co-founders or customers without it.

If you do know what X is, then pitch it around to other potential co-founders. Locally-- you want someone in the same city. Sure, it's possible to collaborate remotely, but I wouldn't recommend it, especially under your circumstances.

To summarize: define your "unique value proposition." Find a local co-founder who is passionate about it. And then, apply to YC.