Dating expert Persia Lawson told the
BBC: "It’s all about having one foot in and one foot out.
"It’s a way of them showing you, ‘Hey, I’m still here’, but not getting into a relationship. They’re keeping communication ever so slightly open, just in case they decide they want to start things up again."
Speaking to
The Independent, dating psychologist Madeleine Mason said: "These people have a warped idea that friendship can be based on likes alone without actually having to engage in real relationships."
Describing it as a lazy form of interaction, said said: "In my opinion, your best bet is to delete and block these people, as they add little if any value to your life."