Can you block someone on a dating site?

Block someone on Facebook Dating Tap Matches, then tap the Dating profile picture of the person you want to block. Tap in the top right. Tap Block [person] in Dating, then tap Block.

Why would a guy unblock you?

One likely possibility is that unblocking you is a symbolic move. Hes ready to move forward. This could mean moving forward in the sense of getting back together — but its best to let him establish that. Thats the other possibility: hes realized he wants you back.