Cressida was insanely jealous of Harry and Chelsy hooking up in Africa and made it clear that she is still interested.
One of the reasons the couple decided to call time on their relationship was thought to be so that Cressida, who is just 25, could concentrate on her career.
She completed a one year contemporary dance course at the Trinity Laban Conservatoire in Greenwich, London, last year.
The pair, who headed off on a skiing trip together to Kazakhstan in March, are said to have been introduced by the Prince's cousin and Cressida's friend Princess Eugenie - although they have moved in the same upper class circles for a number of years.
"It's very, very sad that they have decided to split.
It's very amicable but they have decided to go their separate ways," the source said.