Right this is how I think 'Missing' should have ended, I don't own the lyrics, which were written by Fredo Starr, and I don't own any of the Roswell characters.
Missing 'in action' Liz's POEM

They say this love wasn't meant to be,

2 people from 2 different worlds,

It wasn't meant to be,

It must have been fate you was sent to me,

We'll make it through these hard times eventually

Let's stand and fight,

You know we can make it right,

I can see your brown eyes burnin into me,

And your lone heart was meant to be with me,

I know you wanna ride off into the night,

But don't you know you are my light,

I'll take the sunshine with the rain,

Spaceboy heel my pain

(At Crashdown after hours)

"Torn" by Creed is playing

LIZ: Sorry, we're closed. She says wiping the counter when she looks up to see who it is

LIZ: Michael...um, I'm sorry, the kitchen's closed.

MICHAEL: That's all right. I just ate.

LIZ: Um, you know, actually this is for employees only.

MICHAEL: Max told me what happened.

LIZ: Oh...he did?

LIZ: What did he say?

MICHAEL: He said you wrote it all down, Liz.

LIZ: He said that?...What do you want?

MICHAEL: I want you to know it wasn't smart to write all those things down, Liz.

LIZ: Yeah...I know that now.

MICHAEL: I knew it a week ago.

LIZ: Excuse me?

MICHAEL: That was the night I sat at the first booth. Maybe you remember.

(Flashback to a week ago)

MICHAEL: It was late like tonight and you were at the counter...writing.

MICHAEL: Homework?

LIZ: Uh, yeah...a little bit.

MICHAEL: But it wasn't homework, was it?

LIZ: No, it wasn't. Liz knew she couldn't lie very well.

MICHAEL: You could have put us in an awful spot, Liz. Roswell's not exactly the town you want to be unique in, if you know what I mean. You have to know who your friends are. I had to know the risk...so I had to know what your journal said.

LIZ: You took it...

MICHAEL: I never meant for things to get out of control...it's nice to know we have at least one friend in this town.

(Michael gives the journal back to Liz)

LIZ: Does Max know that you...

MICHAEL: No...and you know what would be really great? If you didn't tell him.

LIZ: But why didn't you just destroy this, Michael? Because anyone that found this would know all about you.

MICHAEL: No...they'd know all about you, Liz.

MICHAEL: Thank you for giving me one more reason to envy Max Evans.

(an silence falls between them, which is for a second, but feels like an eternity)

(Michael turns to leave)

LIZ: Michael...

MICHAEL: And you might want to get better window locks...for when your criminals happen to be human.

LIZ: I'll do that, and Michael...thanks.

MICHAEL: well I had to return it.

LIZ: No I mean for reading it and still speaking to me.

(Michael steps towards Liz and now they're on either side of the counter)

MICHAEL: Thought I might as well start speaking to ya (Michael turns again) you know I'm Spaceboy, we haven't found a nickname for Maximillion yet.

Liz tenses for a moment

Michael: you'll have to update your poetry, not that I read it properly.

LIZ: Yeah...good, Michael I wrote that ages...

MICHAEL: Good night Liz, Max is a lucky guy.

Michael leaves

Liz clutched her journal to her chest and walked off, feeling relieved but part of her wanted him to know that she knew who Spaceboy was, she knew who he was to her. It's funny how you can look deep into the eyes of any hot guy you meet but when it comes to the guy you care about, you just stutter and stumble like you've got nothing to say, Liz normally couldn't look into Michael's eyes but that night, she did for one fleeting moment, and what she saw was a life. A life next to him, next to Michael. But she would never look into his eyes again, she would go on, look into Max's eyes and be safe there, not vulnerable to love