March 30, 2009 12:00 PM

A little more than a month ago, a radiant Jennifer Aniston and her boyfriend John Mayer happily posed for photographers at the Oscars. Now it seems that before the last of the evening’s tuxedos and couture gowns had come back from the cleaners, the on-again, off-again pair had called it quits. “They had some disagreements and decided to not continue to see each other,” a friend told PEOPLE of the mid-March breakup. “Jen seems happy and is moving on with her life like she always does.”

Jennifer, 40, is rebounding with good humor and help from her tight group of girlfriends. She dated John, 31, for roughly a year—except for a brief breakup last August. But after their night at the Oscars, Jennifer traveled to Europe to promote Marley & Me, and when she returned, the couple decided to call it a day. So who dumped whom? Friends say the decision was mutual. “He’s not her dream guy,” says a pal. “She likes companionship, romance—John fit the bill. But she never placed a lot of weight on things.” As for John, “he is a serial dater,” says a source. “Anyone dating him probably shouldn’t be looking for love, marriage and a baby carriage.” Adds another friend: “[With him] it’s younger, hotter, younger, hotter, younger, hotter.”

Her love life may be a touch point for single women everywhere, but the actress refuses to dwell. “I don’t feel regretful,” she tells British Elle magazine in its April issue. “I don’t feel disappointed. I don’t feel let down. I don’t feel any of those emotions that are ascribed to me. I just feel extremely lucky.”

With good reason. Jennifer’s movie career is humming along, with her last two films, He’s Just Not That Into You and Marley & Me earning more than $230 million at the box office. She also stars in the indie film Management, out in May, and starts shooting the comedy The Baster, in which she plays a single woman trying to have a baby, in New York City this month.

Meantime, Jennifer has been spending most of her time with her yoga teacher pal Mandy Ingber and her best friend Courteney Cox Arquette Arquette—and being just fine with that. “I am really proud of my life now,” she told Elle. “I’ve only had great experiences. I want people to know that.”

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