If you just broke up: Unfriending someone is drastic, best reserved for those who made a transgression that cuts deep. Instead, hide their posts, because no one wants to see that their ex is listening to the same Steely Dan song over and over again or posting long-winded status updates about the government shutdown.
It might feel liberating to click that button, but time after time, it will come back to bite you in the ass. These things that you once found endearing will gnaw at you, so do yourself a favor and get them out of your newsfeed.
Don’t waste time demanding explanations and try not to become bitter and cynical.
Respond to everyone, even matches that you think are totally incompatible.
Saying ‘thanks, but no thanks’ takes a few seconds and lets that match move on, rather than hanging around hoping for a response from you.
The fact that you’ve misled them could ruin whatever chance there was of a real connection between you.
Don’t show an interest in matches that you aren’t really interested in. You’ll be able to communicate with them enthusiastically, rather than feeling obligated. It’s usually not personal (they won’t have known you long enough to know the ‘real’ you).