Create backlinks... Check this out: http://forums.digitalpoint.com/showthread.php?t=1623109 Hope this helps
You don't have a lot of time. Here is what to do. Go to Google and type in "top 50 dating bloggers." If it's your dating site, find a way to promote them on the site. Go to Twitter and see how many followers each has. (again by going to Google and typing in the bloggers name and Twitter) If you find a way to promote these people, they will probably tell their followers about your site.
In my point of view do some article marketing, blog marketing and social dating network site. These three things can help you for promote your site.
SEO, adwords and banner purchasing on target websites. Then make your site really works, and those happy people will promote the site for you.