There are a number of ways that someone can go about faking a relationship. One way is to create false social media accounts and post fake photos and messages. Another way is to make up stories about the relationship or to pretend to be in a relationship with someone who doesn't exist. Finally, some people may try to physically mimic being in a relationship by buying couple's clothing or accessories, or by pretending to be affectionate with someone in public. Regardless of how someone goes about it, faking a relationship is generally considered to be dishonest and may lead to negative consequences if the truth is eventually discovered.