Another, much easier option, would be to add a whitelabel dating site to your domain along with your forum (put it to a subdomain or subfolder). One I am using for my www.menprefermen.com is from DatingFactory.com

You can use their templates and literally have a site up tonight, or... If you're really into all the designing, you can create your own look, colors, etc so that it fits perfectly with your site.