If it's a tech co-founder you're after, look out for start-up gatherings or similar in your town.
There are commercial and open source clones of most of these sites out there of all kinds of quality. That doesn't actually matter so much - what matters is that you can quickly get a prototype of what you want to build in front of your potential users/customers.
Swap out some colors and images and make your clone script look close to what you want to build.
If your idea takes off, then you can start looking at building from scratch.
Hope this helps!
I saw two commercial options that were a couple of hundred dollars. Search for "match dating clone" or "match dating script" Can't vouch for them though. Drupal's usually another non-techie option to build a web site, but dating support is lacking.
You'll need to get a developer involved if those commercial options don't let you do what you want.
Here's some inspiration from the author of Mingle2. He spent 66.5 hours to build his dating site: http://mingle2.com/blog/view/how-i-built-mingle2
That way you can see if what you think is a great idea really is.
If not rinse and repeat.
If so add to your team to make it better and keep adding to the product.
Also: Ideas are worthless. Execution is everything.