how to create a online dating site ?

[Jake]

That's one of those businesses that probably require some significant capitol to pump it up to a useful membership level. I can't imagine making money in the short term. Create some sort of dating guide with affiliate links to established sites if you want short term returns.

You might do a search for a well know dating site name and Clone or "dating site clone" to find ready made scripts that might be a good starting point, you would probably still need to hire a programmer to customize and refine it.
A couple examples:
http://www.datingsitebuilder.com/templat...bsites.asp
http://www.scriptcopy.com/match-clone-script/

Well known freelance programmer marketplaces include: elance.com, odesk.com, vworker.com, guru.com

Here's one example of a project soliciting bids
https://www.elance.com/j/pof-clone/34712438/