Tap the heart icon in the row of icons at the bottom of the screen. This opens the Likes page, where you can see a list of people who have liked you. 

New likes are denoted by a small dot to the left of the person’s name and profile picture thumbnail. If you wish to match with someone in this list, you can eithertap the Fluttr Heart icon to the right of their nameor tap on their profile picture, which will take you to their profile page, from where you can also match with them.