If you're taking those dating offers from network, you should encounter the fact that they are already being advertised by dozens lads like you and (which is most likely), by the offers owners themselves in the same sources you're trying to buy traffic from.
Best practices you can apply are
a) better creatives - not just taking some fresh stuff outta spytools, but really working on landing pages, push or banner creatives
b) buying cheap traffic means that the audience behind it was alredy swamped by similar (and many other ads) before yours and less likely gonna convert
c) find a fresh traffic source (nearly impossible) or get a manager's assistance in order to properly set up your campaigns (if you're buying from network)
d) try to practice with the offers which had the shortest flow possible - SOI
e) keep in mind that there were literally nothing new in the dating industry for a long time, therefore - try to find some fresh offer or fresh geo (not EU or NA, but some African or Asian stuff)