The pediatric nurse, 27, recently dumped her Bachelor beau seven months after horrified viewers watched Juan Pablo Galavis refuse to say "I love you" to his final pick on the finale of the ABC show, sources confirm to PEOPLE.
"It's definitely over," says a source close to the couple. "It can't be saved and they're not even speaking anymore."
Viewers watched the pair battle over Galavis's inability to show affection on VH1's current season of Couples Therapy – and the source said Galavis's "disregard" for Ferrell's feelings and his "refusal to introduce her to his daughter as more than a friend" were but two of the many sticking points in the relationship.
Meanwhile, Galavis, 33, "was getting tired of her childish antics and temper tantrums," adds the source.
Though the two were seemingly making small strides in their relationship while undergoing therapy, Ferrell "finally decided that she didn't want to keep up the facade anymore," says the source.
On Sunday, she unfollowed her ex on both Instagram and Twitter, posting a harsh quote that fans speculated was aimed towards Galavis.
"Isn't it pathetic how we waste so much time on certain people and in the end they prove that they weren't even worth a second of it," she posted.
Galavis and Ferrell have not returned requests for comment.