Miley Cyrus and Liam Hemsworth break up rumors are flaring after a source told Hollywood Life the "Hunger Games" star is not willing to put in the time and energy to make the relationship work.

"Miley's very committed to Liam and to making it work, but she has complained that she feels like it's always her making the effort to keep them afloat," the source said.

"Notice how it's always Miley visiting Liam wherever he's working and not the other way around. Miley would love it if Liam would make the effort to fly out and surprise her or something romantic like that but she's not going to fight over it."

The source also told Hollywood Life their biggest stressor is all the time apart.

"Their careers are both exploding right now and neither one of them want to give that up. Liam won't and Miley sure as hell won't either."

Miley Cyrus, who met up with Liam Hemsworth in Canada to visit him for a weekend getaway near his movie set, has been traveling across the world to garner more publicity for her new hit single, "We Can't Stop."

And Liam Hemsworth has been filming his newest piece, "Cut Bank," with co-star Teresa Palmer.

No word yet on how the couple will hash things out.