Javi, who has spoken of his love for his children on social media, also soon after they began dating last September.
It's believed the couple first met through mutual friends in Kissimmee, Florida.
Earlier this month, Javi, who works at Kissimmee's Pride & Envy Tattoos, was spotted on a shopping trip just before spending a weekend with Briana in Miami.
During their stay, Briana filmed several new scenes for the upcoming series of Teen Mom.
While Briana was busy with her day job, Javi spent some down time at a Hallandale Beach gun range.
A source in Miami, who saw Briana and her Javi, told The Sun: "Things have progressed pretty rapidly for the two of them.
“Briana likes the fact he’s a more mature guy with kids of his own; he knows the responsibilities involved with being a parent.
"He dotes on his young daughters and is a great dad and family is very important to him, like it is to Briana.
"They’re a good match in that they’ve got a lot in common before getting together, which helps.
"She definitely needs someone with a more mature attitude. He’s more reserved than Briana though and doesn’t share as much of his life as she does on her social media."
Briana has previously had relationships, albeit briefly, with baby daddies Luis Hernandez, father of her daughter Stella, four, and Devoin Austin, dad of her eldest child Nova, nine.
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