Big Brother couple Holly Allen and Jackson Michie had realistic -- and maybe even low -- expectations for whether their romance would last outside of the Big Brother house, but it appears Holly's love for Jackson has grown deeply in the last three months.

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Holly recently gushed about Jackson on Instagram by uploading a selfie of the couple standing in front of fall foliage.

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"Boyfriend appreciation post. Maybe it's because I can't drink that I'm gettin all [cheese]y instead. Sorry, folks. Proceed with caution. This is my person. My source of comfort. My home," Holly captioned the photo.

"I've been sicker than I ever have been this past month and this guy hasn't left my side. The only problem is... we always laugh and now it turns into coughing attacks. And sometimes he holds me so close it hurts my lungs."

Holly continued, "But not being able to control laughter and hugging too tightly are pretty decently ok problems. Thank you for making each day a little happier. I love you a lottle, J."

As for the location of her post, Holly just tagged it, "Everywhere."

On December 2, Holly also shared some sweet words for Jackson alongside a picture of the couple snuggling on a hammock while wearing matching clothing.

"I'm not 'gr8ful', but I sure am thankful for you," Holly wrote, referencing the pair's alliance in the Big Brother house that eventually crumbled.

"And your huge family who welcomed me with open arms & endless laughs. Also thankful for the OG hammock where our little love story first started."

Holly introduced Jackson to her co-workers at Malibu Wine Safaris, a thousand acre ranch and vineyard in Malibu, CA, in early October, and they've apparently also explored "his world" together in Tennessee since exiting the Big Brother house.

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Michie, a server from Nashville who currently resides in Los Angeles, CA, and Holly, who also currently lives in L.A., worked as a team on Big Brother's 21st season and were desperate to get each other to the end.

Although their romance was on and off due to fighting, Michie and Holly achieved their goal by making it to the Final 2 together.

Michie ended up winning the $500,000 prize through a 6-3 jury vote during the live finale in late September.

After the finale aired on CBS, Michie told Entertainment Weekly, "I might splurge on a trip with Holly... a change of scenery," when asked to share what his plans were for the money.

But Michie was unsure of whether his romantic relationship with Holly would continue and grow into something serious.

"Holly is easy one of the best things that happened to me. She had a great head on her shoulders. And in that house with no distractions people bicker. I've had arguments with just about everybody in that house, and that's part of it," Michie shared with EW.

"But I really do have the utmost respect for her. I want for us to be able to live life together after this week. Ironically enough, we're in the same city. So it won't be hard."

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Michie elaborated, "But I've always said, she said it too, whether we are in a relationship or not, it will not change the fact that we will both be in each other's lives."

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Michie called the Wyoming native and former pageant queen "a great girl."

"If we don't end up together and she gets a new boyfriend, sorry dude, but I will be one of her best friends. And same for me. So it's part of the deal," Michie insisted.

And Holly seemed to be on the exact same page at the time.

"We're seven years apart and have a lot of very, very different interests, and we know that. We've acknowledged it since the beginning," Holly told EW in a separate interview.

"The one thing we promised to one another before anything started romantically is that regardless of how it turned out, we would be friends forever."

Holly continued, "And so as of right now, we have some travels planned, we have some fun things planned, but we're taking it one day at a time. If romance happens now or maybe later on down the road, great. If it doesn't, great. I have a best friend."

Michie and Holly were willing to lie and backstab in order to protect each other in the game. They always had each other's back.

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"Of course, it was rocky. We're 24/7 locked in a cage together, and we can't really talk freely about things because we're being watched, and so we don't understand each other's communication styles and everything," Holly noted.