Nope, this is not the regular performance art piece/stunt we’ve come to know and love from actor Shia LaBeouf. Rape allegations and tumultuous fights aside he and his longtime girlfriend Mia Goth have taken their relationship the next level. “An inside source alleged that LaBeouf confessed that he and Goth were engaged in the presence of a cashier at Gelson’s this month. Apparently, the actress was flashing a diamond on her ring finger and the two said that they were planning on getting married. Prior to this scene, LaBeouf supposedly called Goth his “fiancée” during the live stream of his #Elevate project last month. Obviously, nobody noticed, though, because we heard not a word of this until now.” src:…