Audrina Patridge's former boyfriend has lashed out at her on twitter, calling her "insecure" and "heartless".

Former 'Hills' star and BMX racer Corey Bohan broke up two weeks ago after being involved in an on/off relationship since 2009 and while Audrina has reportedly moved on to Prince Harry's close friend, polo player Nic Roldan, Corey is struggling to cope with the split.

He wrote: "A girl that's told yes by everyone surrounding them grows up to be a heartless closed off insecure individual. Time 2 pick up the pieces & stop being so sad! Some woman will always be empty & rotten from the inside out. U cant love a heartless woman. (sic)"

Corey has since removed the posts and wrote instead: "If the world ends tomorrow it's all good! Family n real friends is what's up!! Don't take anything for granted peeps! Xoxoxoxoxo. Life is easy without insecurities :) my mates are the best. Love u guys!!! (sic)"

Audrina, 25, is reported to have fallen for Nic in Florida, where she is currently filming her new reality TV show 'Audrina'.

A source said: "Major Sparks flew between Audrina and Nic on Saturday night (05.03.11), and the entire evening they couldn't stop laughing and touching each other. Audrina seemed to be having the time of her life, dancing and mingling with guests, but you could tell she was especially focused on Nic."

After partying together on Saturday, the pair then met up again on Sunday (06.03.11) where Nic gave Audrina a "private polo lesson at the International Polo Club in Wellington".

Audrina has previously had an on/off four-year relationship with her 'The Hills' co-star Justin Brescia - also known as Justin-Bobby - and dated singer Ryan Cabrera.