Ask HN: Should I Look For A Co-founder Just For Incubator?

I'm the single founder of a social shopping site (details in my profile). My site is already live for a few months with thousands of users. But I have been rejected by every incubator out there, the feedback I had is always "go get a co-founder". The problem is that finding a co-founder just for the next round of applications is like promising to get married before Thanksgiving. Besides, it'd still be challenging to answer the ubiquitous question of "tell us a touching story of how you and your co-founder met and worked together on something before".

I would truly appreciate your thoughts and advice. BTW, I'm in Singapore but prefer a co-founder with deep US connection.