Dan Osborne says there is "really bad tension" between him and wife Jacqueline Jossa.
The 27-year-old reality star doesn't know whether he will stay married to the former "EastEnders" actress - who he has daughters Ella, four, and 10-month-old Mia with - because the pair are "losing their friendship".
When asked if rumours he has been unfaithful - which he says are not true - could end his marriage, he told new! magazine: "I don't know what's going on but there's only so much anyone can take. It's causing massive problems for us.
"Really bad tension in the house and it's getting worse. We're losing our friendship. We don't argue in front of the kids, but I know they can pick up on it.
"So when I feel it's getting too much, I'll get out of the house and go to the gym or something. We used to be so positive and happy and fun together and we've lost that. But both of us want to build it back. "
Dan insists he's never been unfaithful to Jacqueline, 26, despite reports he has cheated on the soap star - but admitted he's "had enough" and isn't "scared" to end his marriage with the former "EastEnders" actress.
He said: "Look no one's perfect. I make mistakes, yes, so does Jac. But I have not done anything wrong.
"I'm not scared. It's got to the point where I've had enough too. If there are problems in our marriage, then leave us to deal with it."