Twihards everywhere are mourning yet another breakup between Kristen Stewart and Robert Pattison, but hang on, kids -- it ain't over 'til it's over!

No doubt these two will get back together, but it'll take some time to repair their relationship after their big blowout Monday night on Rob's birthday.

As X17online reported exclusively, Kristen spent the better part of that day on the phone with Rob, arguing, and then crying to her friends. Rob zipped in and out of his house only once that day and it wasn't to see Kristen ... The two haven't seen each other since last weekend and all signs point to a split. And X17 told you first!

But here's the good part ... Kristen's finding comfort in pal and fellow Twilighter, Taylor Lautner. The actor has stayed close to Stewart to help cheer her up.

This isn't the first time she's found solace in her co-star; the two hung out at the batting cages back on March 12 with Rob was in Australia filming and Kirsten was lonely. The week before that, she caught a show with Taylor, taking in pal Marcus Foster's concert at the Troubador.

Is Taylor just Kristen's shoulder to cry on ... or something more?

It wasn't the birthday blowout Rob had expected ...

Pattinson and his on-again-off-again (on-again) girlfriend Kristen Stewart didn't celebrate the actor's 27th birthday together, they spent it in a heart-wrenching fight!

X17 photographers spotted Kristen at a friend's house Monday afternoon and the actress was in break-down mode over what appeared to be a possible break-up with Rob.

"Kristen was pacing back-and-forth in her friend's apartment, smoking. She looked really upset, talking on the phone for almost an hour -- I'm guessing she was talking to Rob. She was really animated, like she was trying to explain something. She was getting frustrated and seemed very emotional," our photographer tells us.

After KStew finally wrapped up the heated conversation, she and her pal drove to another friend's house and stayed outside in the street, in her friend's car, talking for almost 45 minutes.

Seems like a tense time for the pair. They celebrated Kristen's birthday just last month, partying with pals and all smiles. What happened? ... Could there be trouble in Twilight paradise?

So much for these two splitting up!

After being photographed with a man who looked a lot like Rupert Sanders last week outside of Malo in Los Feliz, Kristen Stewart and Rob Pattinson went on a snack run at a local liquor store on Sunday evening.

Last week Rob returned to Los Angeles after spending a few days out of town, and though we thought Kristen was leaving any day now to shoot Focus in Argentina, she's actually dropped out of the film!

According to Variety, Stewart left the project because "the age difference between [her and Smith] would be too large a gap" -- Smith is 44, while Stewart is just 23. However, Ben Affleck, who was set to be her onscreen love interest before he dropped out of the film, is 40 years old, so it kinda seems like a lame excuse. Maybe she just wants to spend more time with Rob?

Earlier in the day we spotted K. Stew at Two Boots in Los Feliz, and Rob was nowhere to be seen but she certainly looked like she was on cloud nine.

Was this part of Rob Pattinson's travel plan, or was he heading home early to check on his adulterous lady love?

On Tuesday night Rob touched down at Los Angeles International Airport, and the bearded Twilight hottie carried his own baggage to the curb. Rob jetted out of town last Friday, and that very same day we snapped Kristen Stewart getting into a dark sedan at Malo with a man who looked a LOT like former fling Rupert Sanders.

We doubt she'd be dumb enough to start something up with her Snow White and the Huntsman director again, and 61% of you agreed with us in our poll. But that still leaves 39% of you who think Bella Swan IS getting down and dirty with someone other than Edward! Maybe he was just a pal and Rob is snuggling with her as we speak?

Would Kristen Stewart actually hang out with Rupert Sanders again? Would she possibly go back to the relationship that temporarily separated her from Robert Pattinson and broke up Sanders' marriage?

We snapped these exclusive shots of Kristen Sunday night at Malo Cantina in Silverlake -- the same place Rob took her last week to celebrate her 23rd birthday and the guy driving the car that took KStew and her pals home looks suspiciously like Rupert and the car looks like his black Acura!

After RPatz left town on Saturday, was Kristen getting lonely?

Robert Pattinson and Kristen Stewart stopped by a gas station for some snacks on Thursday, and the duo picked up Snapple iced tea, a large 40 ounce beverage and a jumbo pack of Jolly Ranchers. So that's what vampires are eating these days!

K. Stew heads to Argentina to shoot Focus in the next few weeks, but maybe Rob will pull a Selena Gomez and fly out to visit her? We're not sure what K. Stew did to win him back, but they've been joined at the hip lately so clearly they're doing better than ever!

Oh, and how is this for cute ... on the way back to their truck Rob made a few funny faces at their dog:

Robsten are inseparable these days!

On Wednesday night Rob Pattinson and Kristen Stewart stopped by Room 5 in Hollywood, and when we snapped them on the way out, they were feeling pretty frisky! Kristen seemed to be in a good mood when she stumbled into her car with a few friends, but Rob looked like he was running the 50 meter dash.

From Coachella to spending her birthday together (and every day since then!) these two seem better than ever lately ... Rupert Sanders who?

...And they're showing some PDA!

Everything seemed back to normal on Saturday as Robert Pattinson and Kristen Stewart were hand in hand as they made their way through the crowds at Coachella music festival.

It's been a gradual path for the casual pair since Kristen's infamous scandal with Snow White and the Huntsman director Rupert Sanders, but they have been seeing more of each other like the good ol' days.

Looks like time heals all!