Even superstars sometimes have self-doubt.
The Jenny From The Block singer – speaking in this week’s issue of People - says she’s well aware that the couple’s 18-year age difference draws speculation. (She’s 43, he’s 25).
"I ask him, 'Why don't you go find a young girlfriend and get out of here? What do you want with me?' 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."
In the interview, Lopez -- now a single mother of twins -- also credits Smart will helping her pick up the pieces of her life after her much-publicized divorce from Marc Anthony in 2011 after seven years of marriage.
"I just got out of a big, heavy, devastating thing, and he's (Smart) helped me heal," she says. "He's been there for me."
Despite several of her high-profile romances (think ‘Bennifer’) crashing and burning in full view of the public, Lopez says she has no regrets.
"I don't regret those things – that's who I am," she says. "But at least now I'm at a point where I have to recognize that these choices and things that happen are partly because of me and my decisions and I have to be more careful. So I am being more careful."