"He said that y'all are going to be getting married," DeGeneres bluffed. "He texted me today."
"He did not say that," Lopez responded. "Let me see the text."
Lopez confirmed she and Rodriguez are "very happy" together but said she's not sure if they will eventually wed.
"I don't know," she told DeGeneres. "We've been together a couple years. It's nice."
The Shades of Blue star previously said in the April issue of Harper's Bazaar that her relationship with Rodriguez is in a "good" and "healthy" place.
"I do believe in marriage. And I would love to grow old with somebody in a committed relationship. But I'm not forcing anything right now," the star said.
"We understand each other's lives in a way that most other people couldn't," she added. "We have a similar makeup."
"Beautiful afternoon with my #1," she wrote.