Is Nick Jonas coming between Miley Cyrus and Liam Hemsworth's relationship?

Sources exclusively revealed to Life & Style that the 24-year-old "Jealous" singer has been sending "friendly texts" to his ex-girlfriend for weeks — and Liam is not okay with it.

MORE: These Adorable Then-and-Now Pics Prove Miley Cyrus and Liam Hemsworth Are More in Love Than Ever!

"Liam is furious," a source revealed. "He told Miley she'd better tell Nick to back off."

It doesn't help Liam's paranoia that Nick is currently on the market for a new girlfriend and is looking to settle down.

miley cyrus jonas brothers

As fans remember, Nick and Miley began dating in June 2006 before calling it quits in December 2007. Back in the day, the two stars were just Disney newcomers starting out their careers. Since then, Nick has spoken out about his relationship with Miley — he even admitted she was his first kiss.

“The first person I kissed was Miley Cyrus, and I kissed her outside of California Pizza Kitchen in Hollywood — very romantic,” he said. “I’d just had a pizza that had onions all over it. I’m sure that my breath smelled terrible.”

MORE: Miley Cyrus Wants to Star in Another Movie With Fiancé Liam Hemsworth!

No wonder he can't seem to let the pop star go! Unfortunately, Miley seems completely smitten with her fiancée ever since they rekindled their relationship.

We're sure Nick will soon take the hint and back off for good!

For more on Miley, pick up the latest issue of Life & Style, on newsstands now. And scroll through the gallery below for a look at Liam and Miley’s cutest quotes together!