If u knw a person who lies about everything wat r da chances tht they r liein bout everythin they say?

A kid in my homeroom cl said a girl was his girlfriend nd i asked her since she was my friend i asked her nd she said knw . this isnt the first time he has dne tht. He told everyone tht she met his parents he was wonderin y his " girlfriend" was mad. HE said tht his parents were tearin up wen he told his parents tht they were in " love" later tht day he said his dad soent knw i was lik wat da heck wat is da truth!!!!