Jameis Winston -- FACE TO FACE WITH ACCUSER ... At Student Conduct Hearing

UPDATE 3:00 PM PT -- The hearing has ended and Winston has left. His attorney told reporters as they left the whole situation was "a nightmare." According to ESPN, two of Winston's teammates, Chris Casher and Ronald Darby, refused to testify.

Florida State quarterback Jameis Winston has arrived to the FSU campus for his Student Conduct Code hearing ... where he will face off with the woman who accused him of sexual assault.

The hearing is taking place before a former Florida Supreme Court chief justice -- and if Winston is found in violation of the Student Conduct Code stemming the alleged sexual assault in 2012, he could be expelled from the school.

Winston arrived to campus with his attorney David Cornwell. The accuser has also arrived to the hearing with her legal team.

Winston's attorney told the media the QB intends to "end this process today" ... adding, "Jameis will tell the truth and we are confident that Justice Harding, when he hears her multiple lies and Jameis' truth, will find as every other entity has to this point, that she is lying."

The accuser's attorney also issued a statement ... saying, "Neither Jameis Winston nor his lawyer can stop what is coming."

Winston was not charged with a crime following a criminal investigation into the incident -- with the FL State attorney general citing a lack of evidence.