Flack told her 2.3 million followers: "Been advised not to go on social media ... but I wanted to say happy Christmas to everyone who has been so incredibly kind to me this year..... this kind of scrutiny and speculation is a lot to take on for one person to take on their own...
"I'm a human being at the end of the day and I'm not going to be silenced when I have a story to tell and a life to keep going with .... I'm taking some time out to get feeling better and learn some lessons from situations I've got myself into to. I have nothing but love to give and best wishes for everyone."
Flack accompanied the message with a photo of herself smiling widely.
Her post comes after she appeared at Highbury Corner Magistrates' Court on Monday to plead not guilty to assault.
Flack was arrested and charged with assault by beating after police were called to her flat in Islington, north London, on December 12.
The court heard the alleged attack was said to have occurred after Flack found texts on her boyfriend's phone while he was asleep, leading her to believe he was cheating.
But former professional tennis player and model Burton does not support the prosecution and insists he is not a victim.
Flack was released on bail with conditions that stop her having any contact with Burton ahead of a trial on March 4.
He has previously spoken out in support of the presenter, claiming she has become the subject of a "witch hunt" following her arrest.
Irish TV presenter Laura Whitmore will take over hosting duties on Love Island and its companion show Aftersun when filming commences in South Africa in January.
Caroline Flack attending the ITV Gala at the London Palladium.
Caroline Flack attends the Global Gift Gala at Kimpton Fitzroy in London. (Photo by Brett Cove / SOPA Images/Sipa USA)
File photo dated 22/1/2019 of Caroline Flack who has defended Love Island following the deaths of two former contestants, saying negative headlines about the show made her "angry".
Caroline Flack seen on the red carpet during The BRIT Awards 2019 at The O2, Peninsula Square in London. (Photo by Keith Mayhew / SOPA Images/Sipa USA)
Caroline Flack attending the JW Marriott Grosvenor House London 90th Anniversary. Picture Credit Should Read: Doug Peters/EMPICS
Caroline Flack attending the National Television Awards 2019 held at the O2 Arena, London. Photo credit should read: Doug Peters/EMPICS
Caroline Flack arrives at the Daily Mirror Pride of Britain Awards 2018, at the Grosvenor Hotel, London. Picture date: Monday 29th October 2018. Photo credit should read: David Jensen/ EMPICS Entertainment
Caroline Flack attending the ITV Palooza held at the Royal Festival Hall, Southbank Centre, London.
Caroline Flack attends ITV Palooza!, Royal Festival Hall, Southbank, London.
Caroline Flack attending the GQ Men of the Year Awards 2018 at the Tate Modern, London. Picture credit should read: Doug Peters/Empics
Caroline Flack attending the Love Island Live photocall at the ExCel, London.
Caroline Flack attending the Virgin TV British Academy Television Awards 2018 held at the Royal Festival Hall, Southbank Centre, London.
Caroline Flack attending the 2018 TRIC Awards at the Grosvenor House Hotel in London. Photo credit should read: Doug Peters/EMPICS Entertainment
Caroline Flack attending the Fashion Awards 2017, in partnership with Swarovski, held at the Royal Albert Hall, London. Picture Credit Should Read: Doug Peters/ EMPICS Entertainment
Caroline Flack attending the Glamour Women of the Year Awards 2017 in association with NEXT, Berkeley Square Gardens, London. Photo Copyright should read Doug Peters/EMPICS Entertainment
Caroline Flack attending the BRIT Awards 2017, held at The O2 Arena, in London. Picture date Tuesday February 22, 2017. Picture credit should read Doug Peters/ EMPICS Entertainment. Editorial Use Only - No Merchandise.
Caroline Flack attending the House of Fraser BAFTA TV Awards 2016 at the Royal Festival Hall, Southbank, London. PRESS ASSOCIATION Photo. Picture date: Sunday 8th May 2016. See PA Story SHOWBIZ Bafta. Photo credit should read: Jonathan Brady/PA Wire
Caroline Flack attending the House of Fraser BAFTA TV Awards 2016 at the Royal Festival Hall, Southbank, London.
Caroline Flack on the front row during the House of Holland Autumn/ Winter 2016 London Fashion Week show, at the Tate Modern, London
Caroline Flack attending the ITV Gala at the London Palladium. PRESS ASSOCIATION Photo. Picture date: Thursday November 19, 2015. See PA story SHOWBIZ ITV. Photo credit should read: Ian West/PA Wire
Caroline Flack attending the Music Industry Trusts Award (MITS) in aid of charities Nordon Robbins and Brit Trust at the Grosvenor House Hotel, London.
Caroline Flack arriving at the X Factor auditions held at the SSE Arena, London.
LONDON, ENGLAND - FEBRUARY 25: Caroline Flack attends the Brit Awards 2015 at the O2 Arena, on February 25, 2015 in London, England. (Photo by JC/Capital Pictures/Sipa USA)
Caroline Flack on the catwalk during the Fashion for Relief a charity fashion show hosted by Naomi Campbell for the Ebola crisis in Africa at Somerset House, London.
Caroline Flack attending the launch of Strictly Come Dancing 2014, at Elstree Studios, Borehamwood, Hertfordshire.
Caroline Flack arriving at the I Can't Sing! Stage Show Opening Night, London Palladium, London.
EDITORIAL USE ONLY General Merchandiser, Asif Hossain, watches television presenter Caroline Flack show off this yearâs Sport Relief merchandise during a last minute training session on a checkout treadmill, at a Sainsburyâs store in Whitechapel, east London, ahead of the Sainsburyâs Sport Relief Games, which take place on Friday 21st until Sunday 23rd March.
Caroline Flack arriving for the 2014 Brit Awards at the O2 Arena, London.
Caroline Flack arriving for the 2014 National Television Awards at the O2 Arena, London.
Caroline Flack arriving at The X Factor Series Launch 2013, at the May Fair Hotel, London.
Caroline Flack arriving at the final day of London Auditions for X Factor 2013, London Arena, London.