"Maybe I'm very jealous, maybe I'm envious. You could say all the things [associated] and they would probably all be true, but it would just be uncomfortable all the time," Ben, 33, toldUs Weekly in a video interview.
When thinking about dating the same women as another man on TV, Ben continued, "I feel like at some point, my confidence that is necessary when you're trying to figure this whole thing out would break."
"And then, I think if it wasn't Gabby and Rachel, I think [ABC] would have a really hard problem on their hands."
Gabby and Rachel promised to put their friendship first at the start of the show, and they've faced adversity such as kissing the same guys and facing rejection.
Three men, for instance, dumped Gabby during a group date for Rachel, and three different guys rejected roses from Rachel during the third Rose Ceremony of the season in order to pursue Gabby.
And on the latest episode, Logan Palmer decided to switch "teams" and leave Rachel's lineup of men in order to join Gabby's group. Although Logan hurt Rachel and led her on, Gabby ended up giving Logan a rose at the season's fifth Rose Ceremony in Bruges, Belgium.
"I don't know if [producers] will [have a problem] because I think [Gabby and Rachel] are doing it really well, the best they can," Ben reasoned.
"But if it was me sharing this stage [with someone] like [Season 21 The Bachelor star Nick Viall], I feel like I'd be competing more with Nick more than I would be trying to figure out if this was going to work or not, which feels really hard."
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Ben acknowledged how he would especially struggle with rejection.
"I think it'd be hard," Ben reiterated. "There is just a competition."
"I don't care if it was my best friend. This was all cool with me until... they had their first one-on-ones... This feels uncomfortable. It feels like something I don't want to do. It's already weird enough the way it is."
Ben previously interviewed Gabby and Rachel on the "Almost Famous" podcast he co-hosts with Ashley Iaconetti and recalled, "I have to give them credit because they were telling us who they kissed and how the kiss was and who they're into and who they're not into. That's not me."
Gabby and Rachel have two more weeks of dates before hometowns, but Rachel has battled insecurities and questioned at times if she can even continue the process.
As for Ben, he first competed on Kaitlyn Bristowe's season of The Bachelorette in 2015 and finished in third place, and then he was selected by ABC to star on The Bachelor's 20th season, which aired in 2016.
Following Ben's The Bachelor season, he and his winner Lauren Bushnell starred on a spinoff, Ben & Lauren: Happily Ever After?, which aired on Freeform and featured them planning a wedding.
But Ben and Lauren called off their engagement and split in May 2017, and then Ben looked for love on The Bachelor: Winter Games in 2018 but realized he wasn't quite ready to date again just yet.
Ben became romantically involved with his now-wife Jessica Clarke in December 2018, and the couple went Instagram official in January 2019.