The 27-year-old supermodel has been linked to the cowboy since last year and Adan has now opened up about their love affair revealing Bella "happily" moved into his small mobile home and she made the tiny space feel like a "mansion".
During an appearance on the 'Along For the Ride' podcast, he explained: "She did do the 5th wheel [trailer], happily. It was badass"
"That 5th wheel has always felt small and then you get, you know, somebody that you enjoy spending time with and that 5th wheel went from a 5th wheel to a f**** mansion."
Adan went on to reveal Bella embraced his lifestyle and he came to learn that "material things" just aren't that important to her.
He said: "It was cool because I really wanted that to be a part of our relationship. You know, you start having feelings for somebody and you start thinking things like, 'Man, maybe this is the rest of my life here' and knowing that she is that simple of a human being [and] that the material things aren't important - or the most important thing."
Bella fit right in and even started getting up at 2.30am to prepare breakfast for Adan and his crew before they took part in horse riding competitions.
He added: "Being that consistent and that uplifting and positive and warm to everybody she meets and helping with horses and stuff like that it's just freaking amazing."
However, the couple won't be embracing trailer life for much longer as Adan explained Bella has now bought a property in Texas and he's working on building his own home.
He explained: "I'm working on building a home [but] it's gonna take me a little bit but she bought something that was a good investment for her ...
"Man, I can't tell you how happy I am. I can't tell you how fortunate I am.
"This young lady is one of the kindest, biggest-hearted and sweet person I've [ever met]. I mean I didn't know God made 'em like that."