Taylor Swift Out in NYC Post Joe Alwyn Split, with Jack Antonoff and Margaret Qualley

There's nothing like a familiar face for Taylor Swift in the wake of her split from Joe Alwyn ... as she's getting by with a little help from her pal and longtime collaborator Jack Antonoff.

T. Swift hit NYC's West Village Monday night for a bite at Via Carota, and, apparently, has no issues being the third wheel ... now that she's single. She dined with Jack and his fiancée, actress Margaret Qualley.

The timing of the trio's night out for some Italian is interesting for a couple of reasons. First, Taylor's hardly looking super sad -- at least on the outside -- which might support the theory her breakup from Joe didn't go down all that recently.

Secondly, freshly heartbroken folks rarely wanna hang out with freshly in love couples ... like Jack and Margaret, for instance. They got engaged last May after about a year of dating -- so, again, we'd guess Taylor wouldn't be in the mood to catch up on Margaret and Jack's wedding plans ... IF she and Joe had just broken up.

As we reported, news of Taylor and Joe's demise, after 6 years of dating, leaked over the weekend, but they hadn't been seen together in public in a long time -- and some fans noticed he hadn't been at any of her Eras Tour shows either.

So far, neither is saying exactly when they split ... or who called things off.

Of course, TS and singer/songwriter Jack have worked together for years ... he's co-written or co-produced several dozen of Taylor's tracks. Who knows, maybe they hashed out her next great breakup song while breaking bruschetta!