Caila also posted a video on Instagram of herself jumping into a hotel bed covered in pink rose petals, which were placed to form a giant heart. She followed that up with a video of herself staring at her ring while in the bathtub.
"Still soaking it in," she captioned the image.
After two years of dating, Nick popped the question on January 2 in Sarasota, FL, Us Weeklyreported.
Nick, 27, turned his marriage proposal to Caila, 28, into a family affair, as he decided to get down on one knee on the way to visiting her grandparents.
"He was like, 'We're going to go on a little detour and we're going to spend the weekend with both of our parents," Caila recalled to Us.
"He rented an Airbnb for all of us to stay in, the six of us. So, from visiting my grandparents, we drove a couple of hours to another little town and he said that he wanted to do dinner, just the two of us."
Nick reportedly planned a "very romantic, elaborate evening," which began with dinner at the Ritz Carlton, where he had also booked the pair a suite and decorated the room with roses and candles.
"As we start walking up the table at sunset, by the beach, there was an acoustic guitar playing this beautiful romantic song, 'The Way You Look Tonight' and I start tearing up," Caila admitted.
"And it was just a special evening where we had dinner by the ocean and we kind of talked about our relationship, our lives together. It was just the two of us. Then, at the end of the dinner, he asked me to slow dance and I said, 'Okay.' So we started slow dancing and I'm swaying in his arms and then he gets on one knee and he asks me."
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After Caila said yes, both sets of their parents rushed in from around the corner to congratulate the happy couple and participate in a toast.
Caila and Nick intend to marry in 2020 and are considering tying the knot in Sarasota, Us reported.
The newly-engaged couple just rang in the New Year together and gushed about their relationship on January 1.
"Happy new year!! Can't wait to start the next one with you," Caila captioned an Instagram post of herself kissing Nick on the cheek.
As for the private equity real estate investor and Harvard University graduate, he wrote on his own Instagram account, "Around the world and back again. A year full of exploration, family, and friends. Here's to topping this list in 2020."
Although she didn't end up with Ben, Caila told Us she's every grateful for her time on the show because it placed her on a path that eventually led to meeting her future husband.
"I feel really lucky because I feel like I wasn't meant to go on the show to find love there," Caila explained.
"I was meant to go on the show to find Nick. If I wasn't on the show, I wouldn't ever have met him because I would never have been a blogger and that's who introduced us and set us up on our first date. So, I think everything happens for a reason and I thank God every day."
Caila, who moved from Hudson, OH to New York, NY after her stint on the show, confirmed she was dating Nick in October 2017.
Caila shared a photo at the time of Nick and herself kissing underneath a classic movie theater banner in Cleveland, OH, that read: "Nick Meets the Parents. PS They Love You."
The photo was captioned by Caila, "Now playing in a theater near you."
In a separate video Caila shared, the couple was strolling hand-in-hand and exchanged kisses before she surprised him with the adorable customized sign. Nick's reaction was priceless, as he was both shocked and flattered by the gesture.
Caila later revealed in a September 2018 blog post on her website Olivia had actually set them up.
"My girlfriend Olivia had briefly pulled up a picture earlier that night in an effort to set us up. I really wasn't even looking for someone at the time, having been in New York for over two years -- I thought all the good ones had deserted," Caila wrote, according to Us.
"But Olivia sold me with, 'I feel like you guys are similar. He's a thoughtful listener.' So from one party to this rustic bar, I trusted my friend."
Caila, who was 24-years-old at the time Ben broke up with her, was blindsided, crushed and sent home before a Rose Ceremony in Jamaica.
"I thought I'd be getting engaged in a week-and-a-half. I was ready," Caila said in tears following her ouster.
"I was ready to get married. I was ready to be his wife. I was ready. I was ready for our future. It's all I thought about. My purpose in life is to love other people and I don't know why I haven't found it yet. I thought this was it. I thought this was it. I was ready. I didn't see this coming. I love him, too. Like, I still love him."
That same year, Caila appeared on Season 3 of Bachelor in Paradise and left the show still dating Jared Haibon. Caila even met Jared's family in Rhode Island, but she revealed during an August 2016 episode of After Paradise that "mystical forces" contributed to their split.