Cassie determined she must leave the competition after speaking to her concerned father, Matt Randolph, who advised his daughter in Portugal not to rush into anything considering she didn't even seem 100 percent sold on Colton or in love with him.
Cassie expressed her doubts and hesitation to Colton about their future together, but then Colton professed his love for the 23-year-old assistant speech pathologist from Huntington Beach, CA.
Colton insisted Cassie was The One for him and she'd definitely be the last woman standing -- whether she was ready for an engagement or not -- but Cassie still opted to quit and head home in fear she would never fall in love with The Bachelor star and continue leading him on.
"It was right back into the trap of loving somebody who wasn't quite there with me," said Colton, who was also dumped by former The Bachelorette star Becca Kufrin after expressing his love for her. "It was very hard for me to hear."
Colton actually received warnings from several of his bachelorettes about Cassie's intentions earlier in the season.