She leaves behind three-year-old lad Noah and family friend Rachel Jackson has set up a GoFundMe page to raise money for the boy who has been left without a mother.
Heartbroken Rachel said: “She was a lovely person, vibrant and full of life. She had some really good friends and most of all she was a fantastic mum.
“Her mum Julia fought to get her the right help and Casey did too once she became an adult.
“She had just started treatment before her death, but obviously it was just too later for her.
“At the time she was in a really good place and recently had her nails done and bought Christmas pjs for the family.
“But one thing that people don’t realise with BPD is that changes can happen really quickly.”
Casey’s mum Julia wants to raise awareness over the condition so others suffering can get help.