During season 6 of "Return to Amish," Rosanna Miller had been wanting to go on her first date. She got her wish as she accompanied a man named Nick on a date to a mini-golf course. Nick, who was brought to the trampoline park where the pair met by a man who was there to see her friend Claudia (via TV Shows Ace), had Miller feeling excited about him as a prospect. The two shared flirty exchanges throughout the date, with Nick mentioning his competitive streak but ultimately letting the reality TV star win the game (via Reality Tidbit). After their date, Miller revealed that she didn't feel a connection with Nick, but that wasn't the end of her love life.

Just before the episode aired, Miller announced on social media that she was in a relationship. It didn't take fans long to figure out that she wasn't in a relationship with Nick. Her current boyfriend is also reportedly a former member of the Amish faith, according to Stars Offline, named Johnny Detweiler. In July of 2021, Miller confirmed that she was expecting a child with Detweiler in the comment section of an Instagram post. One of her followers wrote, "news sources say you're pregnant, is that true??" to which Miller replied, "yeah it is true" (via TV Shows Ace). The couple has been quiet about the new addition to their family since, but Miller has reportedly moved back in with her Amish family. The pair appears to be happy but has not yet shared a due date.