'Flip or Flop' Star Christina El Moussa Is Done with Tarek

Christina El Moussa's relationship with Tarek is officially a flop ... and she wants to make sure he's 100% clear on that.

Sources close to Christina tell us there's absolutely zero chance Christina will get back with Tarek because she's fully turned the page. She'll remain friendly for the sake of their 2 kids and hit show, "Flip or Flop" -- but that's it.

We're told Christina's still dating the contractor who offered her a shoulder to cry on back in May, Gary Anderson -- but even if she weren't, she's beyond the point of ever getting back with Tarek.

As for last week's awkward meet-up at Starbucks -- we're told that's just what co-parenting looks like for Tarek and Christina ... especially since they hand off the kids every week.

As we told you last week ... a source close to the former couple told us they hadn't quite thrown in the towel. Our Christina source wouldn't speak for Tarek, but told us Christina's definitely NOT leaving a light on for her ex.