Heather Locklear & Troubled Fiancé Break Up After 'Never-Ending' Holiday Fight

Heather Locklear is single in the new year.

RadarOnline.com has learned exclusively the troubled actress and her on-again, off-again fiance Chris Heisser broke up after a “never-ending” holiday fight.

And now, Locklear, 57, doesn’t plan on returning to rehab because she thinks getting rid of troubled Heisser will resolve the problem.

“The same issues continued with her and Chris — she doesn’t trust Chris at all and if she’s not with him she thinks he’s with other women,” said a source.

“If she’s alone, she assumes the worst and then starts drinking. They fight over text and phone calls until he comes back and it usually escalates.”

As RadarOnline.com previously reported, Locklear’s out-of-control jealousy got her rushed to treatment and placed on a 5150 back in June 2018.

Tragically, the fallen ‘80s icon has had a string of meltdowns. She was already facing charges for battery on a police officer and resisting arrest after cops tried to break up a dispute with her beau in February 2018.

Then, in early June, she was taken to the hospital after threatening suicide following another fight with Heisser.

And this time was no different!

“They started fighting on Christmas Eve and Chris took off. They continued fighting until after Christmas," revealed the informant. "Then Chris moved out of her house before the new year,” continued the source.

According to the insider, Locklear believes that Heisser has been the reason why she hasn’t stayed sober.

“She’s been in and out of rehab and nothing has changed, so she decided to change what she thinks source of the issue is — Chris!"

“That’s why she hasn’t returned to rehab. She’s rationalized that she doesn’t think she needs treatment now that he’s out of her life,” added the source.

The former Melrose Place beauty was expected to stay in rehab after cops and an ambulance came to her L.A. area home on November 18 following what sources said was another argument with her ex-beau. Also, as RadarOnline.com revealed, she exhibited bizarre and disturbing behavior — including drinking from a bottle of tequila, speaking in “evil” voices, and running outside nearly nude.