There are tons of online dating sites that will pay you from 30-200 dollars when someone signs up to their site from your affiliate links. With millions of singles online looking for love, your earning potential is huge.
First thing you’re going to want to do is generate traffic. The possibilities are really endless but i will outline a few ways here:

1) You could start a blog giving advice love and relationships.

2) You could start a review site reviewing all the different dating sites that are on the internet.

3)You could make a nice landing page and buy traffic from Google Adwords.

Next thing you’re going to want to do is find a dating affiliate program that will convert your traffic into money. Some programs sell better than others and there is 2 ways you can find out what works best for you. One way is to just test your traffic. You can send x amount of hits to each sponsor and at the end of a specified time frame review how much money you made and go with that sponsor. The other way is to find other Dating Affiliates and ask them what is selling best. You could join webmaster forums that cater to Dating Affiliates or find sites that review dating programs.