The model became linked to the Wild Boy star in April (15), seven months after she filed for divorce to end her year-long marriage to Khalifa, amid allegations of his infidelity.
The pair played coy about the dating rumours for weeks, but finally confirmed they were an item in May (15).
However, Kelly admitted he was struggling to deal with the intense paparazzi attention the budding romance had garnered, insisting the invasion of privacy "makes you rethink this whole fame thing".
Now it appears the pressures of the media attention and Kelly's life on the road has prompted the couple to go its separate ways.
During a recent podcast with celebrity blogger Perez Hilton, Rose explained, "No, we're not dating anymore. I think it was just a mutual agreement. We're still really good friends.
"I can't really support a man on tour anymore. I kind of did that already and I'm just not in a space where that's really what I want to do. I just need to focus on my son and my business. I'm dating other people and just having a good time."
Rose's comments emerge during the same week she publicly reunited with Khalifa for the first time since their acrimonious break-up last summer (14), which subsequently led to the stars fighting over custody of their two-year-old son Sebastian.
However, the busty blonde suggested the feud was over in April (15), when she posted a touching message intended for her estranged husband on Instagram, admitting he'll "forever be the love of my life", and last Monday (10Aug15), the former couple proved it had patched up its differences for the sake of its son, after Rose and her kid joined Khalifa for the final night of his Boys of Zummer Tour with Fall Out Boy in Los Angeles.