They grew close to each other during their stay on reality show "Bigg Boss" last year, and post the show, they were spotted together at several events. Yet, Tanishaa always maintained that Armaan is her "best friend".
"Tanishaa and Armaan were definitely two different people and hence after the ups and downs throughout this past one year, they realised that they were just not meant to be," said the source.
They are said to have split on a good note.
"Unlike many break-ups, where there is a lot of bad blood, these two have decided to remain cordial. And hence, Tanishaa was (recently) spotted at Armaan's father's birthday as well," the source added.
Meanwhile, the duo is concentrating on their respective careers.
While Tanishaa is busy in launching her production house T.Mukerji along with her mother Tanuja, Armaan on the other hand has been preparing to come back to films.