The facebook dating app is not available everywhere, therefore if its not working for you, it might not be available in your country.
Facebook dating a space within facebook that makes it easier to meet and start new conversations with people who share your interests.
It's Facebook Official, Dating Is Here About Facebook
Facebook dating is a digital dating product developed by facebook. There is currently no web version, it is only available from the facebook mobile app on android and ios.
Your facebook dating profile and conversations wont be shared with anyone outside of dating. And everything you need to start your separate dating profile is already on the app you know.
Facebook dating makes it easier to find love through what you like helping you start meaningful relationships through things you have in common, like interests, events and groups.