In a confessional Sean reveals: "There have been times that I have said, 'I just can't do this anymore' "

By Lanford Beard
Updated December 04, 2015 10:00 AM

America fell in love with Sean and Catherine Lowe on The Bachelor, but now the famously real couple is revealing that their marriage isn’t always rose petals and fireworks.

In an exclusive sneak peek at Friday’s premiere of Marriage Boot Camp: Reality Stars, it’s clear the Lowes – who celebrate two years as husband and wife on Jan. 26 – don’t always see eye to eye.

When former Newlywed Game host Bob Eubanks stops by to test the couples on how well they know each other, it’s a shock to the other participants when Sean’s confessional shows him saying, “There have been times that I have said, ‘I just can’t do this anymore.’ ”

“It’s in the heat of the moment,” clarifies the former Bachelor, 32. “I don’t mean that I can’t do marriage anymore, I mean that I can’t do the fighting anymore.”

The tension ratchets up when Sean and Catherine are also, understandably, not on the same page about their disagreements: Catherine, 29, worries Sean invalidates her feelings, and he thinks they sweat the small stuff too much.

Asks Eubanks, “Does somebody just walk away?”

Sean admits, “I will – ’cause I just gotta get away.”

To the side, Boot Camp leader Elizabeth Carroll whispers worriedly to her husband Jim: “There’s trouble in paradise.” (No, not that Paradise.)

Catherine candidly told PEOPLE in November that this series will “be very different from what you’ve seen us do before.”

And Sean previously admitted to PEOPLE that he’d been reluctant to join the cast: “I was hesitant going in. The very first day of filming, I was like ‘Get me out of here.’ … Catherine, she kind of convinced me to stay because she really had a heart for the people. I kind of jumped on that bandwagon a couple days later.”

He added, “It was a really, really difficult two weeks for both of us … me especially. I just relied on my wife to really carry me through a lot of it and to motivate and inspire me to stay and not go home because I felt so uncomfortable. So, just that alone, I think strengthened our marriage.”

Marriage Boot Camp: Reality Stars premieres Friday at 9 p.m. ET on WEtv.