Can I borrow your co-founder? I need another body to apply to YC. I don't need anyone else to do the work, just someone whose presence will tick YC's boxes.
I don't mean to be patronizing (I don't see how it remotely is). Going at something with a partner isn't a requirement for success, nor is it only for "cheering up." Investors like to invest to successful ventures, and a business partner is a nice assurance for them.
But go ahead and show 'em, you rebel without a cause. ;)