Express your interest and encourage someone to reach out to you first by starring them. When you star someone, we'll let them know you're interested in exploring a relationship and we'll suggest that they send you message.
To star someone, click on the star in the upper right corner of their 
profile GIF or click the star button at the top of their profile.
To see who has starred you, click on the star icon at the top of your phrends list in messages. 