In an interview with Le Parisien in France:, OutShe said she didn't tell any of her family before posting the post.
“Coming out is an opportunity to send a powerful message,” she said.
She added that she believes the anti-gay laws that existed before her father came to power were “unfair” and that she hopes her story can help change them.
Paul Biya, 91, has been Cameroon's president since 1982, making him one of Africa's longest-serving leaders.
Mr Villa said he had been dating the Brazilian model for eight months and had already taken her to Cameroon three times without telling her family that they were dating.
The musician, who lives overseas, said he has received a lot of supportive messages as well as negative responses since posting about his relationship.
She added that she was happy to be public about her condition and wanted to “give hope and love to people who are suffering because of who they are” and help them feel less alone.
According to Le Parisien, the first person to call her after the post was published was her brother, who was upset that the post had been published without warning the family.
Her parents, the president and first lady Chantal Biya, later called her and told her to delete the post. “I’ve been silent since then,” she said.
She said she first fell in love with a girl when she was 16, but found it difficult to express her love because of the situation in her country.
In Cameroon, homosexual relations are illegal and punishable by up to five years in prison.
Neither the president nor the first lady made any official comment.
A government source told French broadcaster RFI that the matter “concerns the private life of an adult living abroad and has no bearing in any way on Cameroon or the head of state.”
Human rights groups that have criticized Cameroon's laws banning same-sex relations have praised Mr Biya's revelations as a courageous move.
