Sophia Bush is single again after almost a year of being off the market.

The 32-year-old actress and her boyfriend Jesse Lee Soffer have decided to call it quits after dating for nearly a year, Just Jared reported. A source claimed that the "Chicago P.D." co-stars, who have kept a very low-key relationship, eventually grew apart.

"Sophia and Jesse just didn't work out," a source told Just Jared. "They dated for about a year and then grew apart. They're still friends though!"

A source told E! News in August that Bush and Soffer were "secretly dating" and "only close friends" know about their relationship. The source added that Soffer was "super-sweet and they are really cute together."

Before her relationship with Soffer, Bush dated Google engineer Dan Fredinburg for 10 months, but the two also called it quits because their busy schedules made the relationship "impossible to maintain."

Fredinburg was killed in April in an Earthquake in Nepal. After hearing the news, Bush took to Instagram to pay tribute to the man she caller her "favorite human beings on Earth."

"[Fredinburg] was one of the great loves of my life," she wrote. "He was one of my truest friends. He was an incredible brother, a brilliant engineer, and a damn good man. I'm devastated and simultaneously so deeply grateful to have known and loved him, and to have counted him as one of my tribe.

The actress previously dated her "One Tree Hill" castmate Austin Nichols for six years before splitting in 2012. She was also briefly married to Chad Michael Murray for five months in 2005.