Kristen Stewart Heartbreak, Taylor Lautner 'Support' After Robert Pattinson & FKA Twigs Engagement Shocker Sparks New 'Twilight' Dating Rumors?

Rumors suggest that Robert Pattinson is now engaged to (short-time) girlfriend, FKA Twigs. But where does that leave former "Twilight" sweetheart, Kristen Stewart?

Heartbroken, apparently. Robsten's done for good, and the 25-year-old actress knows that - but it still hurts. Especially since R-Patz apparently didn't give her any warning! Following the engagement shocker, an alleged HollywoodLife.com insider detailed K-Stew's reaction:

"When Kristen first heard that Rob and FKA Twigs are engaged, she felt devastated. She doesn't want to believe it's true and was seriously hoping that this was just some sort of April Fool's joke... After only five months of dating, she can't believe Rob would propose to FKA. She and Rob dated for years! Hearing this has really taken a blow to Kristen's confidence. She was holding out major hope that there wasn't any truth to their engagement... Kristen is especially hurt to hear that Rob is engaged to FKA because marriage is something she obviously spoke about with Rob when they were dating. Of course they did, they were together for so long!"

But now she has another guy to lean on for support - Taylor Lautner! Nothing romantic, the two are just longtime friends. And the 23-year-old "Abduction" hearthrob understands why Stewart would be upset:

"[Taylor] already reached out to her to offer support and to remind her that it's out of her control and not to beat herself up about the past," another snitch tells HollywoodLife. "He found out about Rob's engagement just like everybody else, on the internet, and as soon as he heard about it he reached out to Kristen."

How sweet! The source continues:

"He's been there with her throughout all the ups and downs with Rob and totally understands how the news is playing with her head... He's always been like her rock and visa versa."

So - would those two actually make a cute couple? Nah...