Trouble in paradise!

Following her reconciliation with Liam Hemsworth, a friend of Miley Cyrus tells In Touch that the singer/actress is scared her fiancé will “wait until the last minute to dump her at the altar.”

“Him dumping her would put her into a very dark place mentally, emotionally and physically,” the 23-year-old’s friend reveals. “She will fall apart — and it will be ugly. She won’t be able to handle it.”

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The songstress — who initially ended her engagement with the Hunger Games actor back in 2012 — is feeling pressured by Liam’s family to stop her wild antics.

“She’s afraid that Liam will leave her because of the massive influence his family has over him,” her friend tells the mag.

The friend adds, “So she’s made it clear to him that if this relationship is going to work, they are both going to have to ignore what their friends and family say.”

For more on this, pick up the latest issue of In Touch, on newsstands now!