This is probably the opposite of what you’ve been thinking, but it may have actually been Liam Hemsworth’s partying that drove him and Miley Cyrus apart.

A source told “People” magazine, “Everyone always thinks Miley is problematic and immature and a hardcore partier while he’s this chill surfer dude…

“[But] Liam parties with his friends, and Miley thinks he should’ve grown out of that by now…He can also lash out at her, and he hates the attention their ups and downs bring.”

TMZ claims that Liam is also using “certain drugs” that Miley doesn’t approve of.

But friends of Liam told TMZ that Miley’s people are making this up in order to hide the fact that they broke up over Miley’s infidelity.