Jennifer Lopez and Beau 'Casper' Smart Have Split, Says Source: 'It Wasn't Anything Dramatic'

Jennifer Lopez is single again.

The singer and actress, 47, and her longtime boyfriend Beau ‘Casper’ Smart, 29, are no longer dating, a source tells PEOPLE exclusively.

“Jennifer and Casper have split,” the source says. “They have not been together for a few weeks.”

“It wasn’t anything dramatic and they were on good terms – it just came to a natural end,” the source adds. “They will remain friends and they see each other, but they are not together. It was very amiable.”

A rep for Smart declined to comment on the split, while a rep for Lopez had no comment.

Rumors of Lopez and Smart’s romance first began circulating in late 2011. At the time, a source told PEOPLE it was “a fun fling” and “not meant to turn into anything more.” But the Shades of Blue star and the actor and creative director stayed together – speaking openly about their relationship in July 2012.

“She’s sweet, funny, nice, easygoing and gracious,” Smart said of Lopez in March. “You can’t ask for anything more. She’s beautiful.”

While they have been on-again and off-again in the past, they have mostly kept their romance out of the spotlight.

“We don’t really go out very much,” he explained. “We both don’t drink, we don’t do any drugs, smoking, pills or any of the craziness. We don’t get wrapped up in the Hollywood life that can chew you up and spit you out. I’ve seen it happen a million times.”

The couple have lately been spotted together in Las Vegas – getting cozy on Lopez’s birthday party in on July 24. Smart even attended her hit Caesar’s Palace show on Aug. 13 – alongside Lopez’s ex-husband Marc Anthony and his model wife Shannon de Lima.

A few days later, on Aug. 16, Smart was spotted out in West Hollywood, after dining at Craig’s Restaurant with former Pussycat Dolls singer Nicole Scherzinger and Modern Family star Sarah Hyland.

Lopez previously told PEOPLE and EW‘s editorial director Jess Cagle that Smart has a big role in the lives of her , Max and Emme.

She balanced the relationship between Smart and Anthony by putting her kids’ interests first.

“My relationship with them – our references are always in reference to the kids. What’s best for them, what’s good for them, let’s talk this way in front of them… Once they’re happy, they just add happiness and joy into the home and then everything else kind of goes from there.”

FLASHBACK: See How Jennifer Lopez Supports Casper Smart

While Lopez – who was snapped filming Shades in New York City on Wednesday – told Today in January that she would “maybe” get married for a fourth time, she also confessed that she’s learned her relationship status doesn’t have a strong affect on her happiness.

“Someone can add to your happiness but that’s not what’s gonna make you happy,” she shared. “I had to get happy on my own. It’s been a learning curve.”

• Reporting by ELIZABETH LEONARD and LIZ McNEIL