The controversial reality TV contestant shared the announcement in a since expired Instagram story.
According to Pedestrian TV, this is how it was written:
"Is now the right time to tell you that I was dating Brooke during the exact moment she decided to turn full lesbian?
"I literally have no hope with women. Just for the record she is a dope chick and a really good human. But guys, you have not felt pain and confusion until a girl leaves you for a girl."
After receiving backlash for his comments, Blake has taken to Instagram again to clarify what he said.
"At the point in time when me and her were dating, she decided to turn gay, at that point in time she obviously was figuring things out as any woman or man should at that age.
"However many years later she actually stared dating another guy so therefor there is no need for 'everyone to focus on what sexuality she is'.
Blake's statement comes days after 23-year-old Brooke shared with Bachelor Nick Cummins that she had previously been in a relationship with a woman.
"I felt pressure to come out – with the girls wanting me to tell Nick, but I wanted to tell him in my own time," she told WHO.