The 26-year-old British royal had reportedly refused to accept their relationship was over.
A source told the UK's Daily Mail: "He wouldn't leave her alone and kept pestering her to move back to London and for them to get back together. But she is not having any of it this time.
"She only got back together with him last time because he would turn up at her flat in Belgravia unannounced, call her and text her. Eventually, she gave in."
Apparently Harry has now accepted that their relationship is finally over. A pal of the prince said: "Last week, he was telling everyone he is single and was trying to get off with all the girls he could."
Get in there, girls!