The 43-year-old singer-actress, who has four-year-old twins Emma and Max with her ex husband Marc Anthony, said that she worries about the longevity of the romance with the 25-year-old given their age difference, reported People magazine.
"I ask him, 'Why don't you go find a young girlfriend and get out of here? What do you want with me?'," Lopez said.
"And you think, 'How long is this gone be?' You think, 'Okay, in 10 years I'm going to be like this and you're going to be like that' and ... Men at that age are ... I think all different things.'
"The truth is we don't know what's going to happen. We're loving this moment right now. We make each other happy," she added.