Yes, she was. See 'related links' for more information.
Falling in love with Endymion.
Selene showed her love to Endymion by visiting him every night while he was asleep. She would watch over him and shower him with her light and beauty, demonstrating her affection and devotion to him through her nightly presence.
Mythos - 2012 Selene and Endymion was released on: USA: 1 December 2012
Selene, the goddess of moon fell in love with Endymion. He was believed as a hunter or shepherd. They had fifty children.
Endymion is the consort of Selene the Greek goddess of the Moon.
Endymion
Selene's chosen consort was Endymion.
She was not married, but she loved Endymion who was a shepherd or a hunter.,
Selene asked Zeus to grant Endymion eternal sleep because she wished for him to remain eternally youthful and beautiful, preserving their love without the ravages of time. By putting him into an everlasting slumber, she could visit him each night, ensuring they remained together, even if only in her dreams. This act reflects Selene's deep affection and desire to protect Endymion from mortality.
Endymion was the handsome young man loved by Selene the Greek goddess of the moon. He was put into eternal sleep to preserve his youth. ;)
Endymion was in fact a shepherd Prince, and after falling in love Selene then made him sleep forever young and had fifty daughters -called the Mênai- with him.
Selene, goddess of the moon