updated 11/30/2011 AT 10:00 AM ET
•originally published 11/30/2011 AT 8:00 AM ET
After meeting her fiancé Roberto Martinez on The Bachelorette last year, Ali Fedotowsky says she was ready to wed – and right away.
But after an 18-month engagement, the pair called it quits on Nov. 21 – and now, Fedotowsky is speaking out about what went wrong.
“I wouldn’t be being truthful if I said this came out of nowhere,” a tearful Fedotowsky, 27, tells PEOPLE for its new issue, on newsstands Friday.
“We definitely had been having problems. But I had always believed that we could work it out.”