A/N: This is a three parter. This is part one. Part two is going to feature Summer, and part three is going to feature Seth. This is Marissa's part. I'd like to know what you think.

This is set in my little Seth/Marissa universe. Or saga of stories. Whatever. If you haven't read my previous S/M fics then I reccomend you read them so you'll know what's going on.

Forget to Forget

It was a warm day. Clouds scattered around the sun and there was a slight breeze in the air. It was the second week of November. Two months and one week of school. Two months, two weeks and three days since Summer and Seth had gotten back together.

Marissa tries to get the thought of it out of her mind as she walks through the halls of Harbor High, but she can't get the sight of it. Unfortunately, Seth's last name begins with the letters C and O also, so therefore his locker is just six down from Marissa's, and every day, she gets enough doses of Seth and Summer's cutesy couple-ness to make her feel like vomiting. Or to make her forget to forget about the past three months.

Seth didn't talk to her anymore.

Well, at least not at school. He'd phoned her a week after he got back with Summer. He askedher to meet him by the beach at ten o'clock that night. When she went, he'd said something like, I needed to see you. I can't stop thinking about you. About us.

There was no 'us', she'd told him.

But I wanted there to be, he'd replied.

Then he'd kissed her. And for that long wonderful moment, she forgot about Summer and just fell deeper and deeper and deeper into his kiss, but then she remembered and pulled away.

Seth, we can't. You have a girlfriend now. And she's my best friend, she reminded him.

He didn't say anything. Only stared at her. Then he'd said, Summer won't find out.

And she'd felt as if she'd swallowed a rock because of how much she was hurting Summer, even if she didn't know it, but Marissa finally had him and that's all it took for her to give in.

So a week after that night at the beach she met with him again. And then again, two weeks later. And then she started meeting him twice a week. And it was amazing. Seth was amazing. Seth's kisses were amazing. Seth said she was amazing. And it was amazing that nobody had caught them yet.

Then one day, it stopped. They hadn't gotten caught. He just stopped calling her. She didn't know why. She tried calling him but all she got was his voicemail. He never replied. So she stopped, too. That was two weeks ago.

Marissa arrives at her locker and fumbles around with the lock to make out the combination. It takes her a while. Out of the corner of her eye she can see them, Seth and Summer, sipping coffees and probably giggling about their matching outfits. Seth and Summer. Always together. No one even knows who Seth Cohen or Summer Roberts are anymore. They are a couple, they are in love - they are Seth and Summer. Seth & Summer. They are set in stone.

Marissa opens her locker and trades her history textbook for her science one. She glances at herself (not their reflection, not their reflection behind her) in her mirror. She closes her locker and begins her to next class.

Seth drapes his arm around Summer as they begin to walk in Marissa's direction. She knows they aren't coming to talk to her. She waves at him anyway. He doesn't see her. Neither of them do. She tells herself that it's only because she's too far away, but she knows she's obviously lying to herself. Marissa doesn't think she'll be seeing Seth alone for a long, long time.