From my experience of multiple partnerships in multiple start-ups, regular, constant communication is one of the key components to success.

In startups, the work isn't just about keystrokes, and it's not just about sales, it's about solving problems, quickly. From what you've said, it doesn't look like this is a fit.

It's a marriage once you're in it. Cast a wide net, be picky, get out there and date for awhile. Hate to be cliche, but there are plenty of fish.

Find someone who will fight as hard for it as you will, who will fight hard to earn and maintain your respect, and will communicate with you.

Don't be his start-up booty call.