Summary: Blair has a sneaking suspicion that Nate is cheating on her, so she goes undercover with Chuck's help, but she finds herself falling for him.

A/N: Hope you enjoy this story! P.S, this is based off the books (because I don't watch the show, but there looks are based off the show). Have a great day. Reviews appreciated. By the way, I'm not HATING on Nate…(: I just have grown accustomed to Chair.

We're just friends isn't gonna work this time.

Chapter One: N goes under the covers

Mmmm, I love this time of year. The time when Barney's goes 20% off on clothes, and Starbucks brings out that delicious Pumpkin Coffee I've been dying for. But my favorite part is when B and N cozy up on the couch and watch Audrey Hepburn. Unfortunately this Fall, I think it's all going to change.

That's all for today kiddos! TTYL.

You Know You Love Me,

Gossip Girl.

Blair shuffled around the room. Usually she was flawless and ready for another day at Constance, but today was different.

Sunday had been the end of Serena and Blair's smashing party-well, really, Monday had been the end.

Blair and Serena had planned the party for fun. It had been quite a stressful week for Blair, she had gone to all her after school affairs after school, and Serena had been babysitting the kid of the owner of Barney's. Stressful right? So, the duo had planned a party.

They'd bought all the alcohol, and Serena had bought some blue and pink streamers. Streaming them everywhere, they then went to the flower shop to buy dried blue petals. Afterwards they had gone to Barney's to buy themselves something to wear.

As if they didn't have a single thing to wear!

They had agreed to split the color, Blair getting something blue and Serena getting something pink.

Blair had picked out an above the knee strapless dress. It tugged at her perfectly, and she had also bought some black tights. She had then decided she needed a new headband. Carefully selecting a navy blue headband with a small bow and polka dots, she examined herself in the mirror.

Gorgeous was the only thing she thought.

Serena had picked a bright pink mini skirt. It was not cliché, no pockets (thank god!), and some white polka dots. She then bought a silky white tank top with the exact color neckline. She also bought a pair of pink pumps; even testing them out by tromping around loudly around the jewelry department. She had then picked out small round silver earrings.

Stylish and Cute was what Serena thought.

They sent out invitations, Blair sending out 100 telling the person to wear blue if they were attending, Serena doing the same thing-in reverse.

The party had been a smash, Serena and Blair only sneaking downstairs once to get some more drinks from Serena's father's cabinet.

Little Jenny was there too. She had been showing a little too much cleavage, but nobody seemed to mind.

Serena and Blair had been switching their silver iPod Nanos all evening for the music, but nobody noticed when the music went off for a sheer second.

So here we are, Monday morning. Blair had gotten dressed and fixed her hair, just combing it back.

She had a raging headache. Not from the party, but from the thinking she had been doing.

Nate and Blair had only danced four times at the party, all fast dances. He disappeared twice. The first time he had said that he was going to get a drink. An hour later he forgot her drink.

The second time, he had just slipped away while Blair was selecting a slow song for her and Nate.

Bad timing, N.

Blair decided it was nothing, and continued to have fun.

She made the decision during Study Hall to e-mail him.

Natie!

U like tots left me last nite. I missed u! I miss u!

Txt me!

Love,

B

Then she went to lunch.

Later that day, after her after school stuff, she met up with Serena at 5 Guys for fries.

"Blair!" Serena called to her friend as she spotted her walk in.

Blair smiled and walked over to her friend.

"I missed you in study hall." She said as she dipped a soggy fry into ketchup.

"Yeah sorry. I was e-mailing Nate." she took out her.

"Oooh, hot and heavy?" Serena teased handing her friend the glass of water she had ordered for her flawless friend.

"How would I know? He never e-mails back anymore! And he doesn't text back." Blair said.

"C'mon, B. He's a boy…they're a different species."

"I know." Blair sighed. "Thanks, I'd better be getting home." She picked up her plaid backpack and pranced out the door.

"Cya later Blair!" Serena called as her friend left.

Jenny's cell phone spun around the table she had laid it on. She ignored it, because all she could really think of was how she was going to explain why she was late for dinner to Dan.

Whatever. This is Jennifer time.

And then Jenny (excuse me, Jennifer!) laid down and covered her naked body with the sheets.

"Wow." That was all Nate could say.

GG again.

Just a short update. But wanted to keep you all connected!

Sightings:B spotted at 5 guys with S chowing down on fries and water. N spotted going up to D & J's apartment house with a mysterious plastic bag and a mischievous grin on his face. What's the rascal up to now? D clubbing with V after 2 hours of begging from her.

XOXO,

Gossip Girl…

A/N: Tell me what you think please!