Actress Reese Witherspoon’s ex-husband, Ryan Phillippe, and his new girlfriend, “Dear John” actress Amanda Seyfried, reportedly broke up after dating for over three months. The decision was mutual and the two will remain friends.

When Ryan (36) and Amanda (25) started dating, they were hoping their romantic relationship would turn into something more serious. However, Amanda is probably way too young to commit and was also most likely not interested in playing house with the actor.

Amanda Seyfried Sexy & Raunchy For Esquire Magazine

“They are not dating anymore,” a source reveals to UsMagazine. “And it’s not a big deal for either of them. At one point, there was a chance it would develop into something more serious, but it never did.”

So Ryan was free to mingle when he was allegedly seen hitting on singer Rihanna during the Gucci/Roc Nation Brunch at Soho House in Los Angeles, California last weekend. Rihanna basically blew him off.

“He said something to the effect of, ‘What are you doing tonight?’ and she signaled ‘sleep,’” a witness tells Us Weekly. “She was trying to be polite, but she was genuinely not interested. When a couple of her friends came up to join the conversation, he just walked away.”

Rihanna Half Naked In See-Through At 2011 Grammys

No luck! Girls, Ryan is single. The “I Know What You Did Last Summer” actor will have no problem finding another girl to pick up the pieces of his “broken heart”.

[images: Michael Wright/wenn.com]