Eva Mendes‘ eight- year relationship with Pe ruvian filmmaker George Gargurevich appears to be on the rocks, sources tell Page Six. The stun ning actress and Gargurevich have been struggling “since the sum mer, when she said she wasn’t ready to get mar ried,” the source said. However, the pair re main closely tied, with Gargurevich, who’s also known as George Augusto, still closely involved in Mendes’ businesses, in cluding a luxury bedding line, the insider noted. Mendes’ rep did not re turn our calls or e-mails.