You have to promote your landing page using various methods of promotions like forums, blogs, article directories etc.
as your site is dating site so better to promote in social media and booking sites to get instant effects.
Article directories, squidoo can be a the best free options for you. Also, if you have some budget to spend at advertisement, I would recommend you to use Google adwords to promote your dating websites. It does work very well in these kind of niche.
One of the best ways is to get social media traffic regarding dating sites. I targeted instagram (but stopped) and also other social medias, to send to my dating site (white label) mobile enabled too. It is getting 3k of visitors every month now. Not much but i ain't doing a thing with it. The database grows and grows (free signups) then the real signups will start to pickup and the rebills of course.