So here's the original post I made yesterday for some background on the situation I'm in. Need some advice - How to expose a tease?

So anyway, this morning I see her out at our smoke break and she seems a little bit cold. Not really looking at me as intensely as she has been the past few weeks... And sure as shit, she tells me that some other place is having a lunch special that she doesn't want to miss out on and that we should do the pizza thing next week. Well, this girl flakes out on plans all the time (not just with me either, it's her calling card I think). So I act a little pissed off and tell her that no I don't think we can just go next week instead, but whatever... Do whatever you want.

I get back to my desk and forward back to her the email discussion we had going where she said that she'd love to go out to lunch today and that she definitely won't flake this time! I replied and said, "remember this? lol - My God, what a tease."

45 minutes later she's in my cube asking me if she can still go with us to lunch... I say, no I don't think so... She gives me puppy dog eyes, and I say, OK fine, you can come. She does a little happy dance and leaves. Great.

So we're all on our way to lunch and she's bring up her boyfriend a little bit... I'm starting to get a little irritated by this, but I play along and just assume that this is her lame attempt at conversation. We sit down in the booth, she slides in next to me, very close, and spends the entire time brushing up against me with her arm, and leg. I swear at least 10 times. But all the while she's talking about how her and her boyfriend were shoveling snow yesterday and how it's funny that he didn't like the meal she cooked for him and blah blah blah... I change the subject a few times to talk about my plans for the future and anything else I think the group might find interesting. And that was pretty much it.

Now on the way home, she's in my car, and she briefly touches my hand before we're out of the parking lot. We're joking and laughing about building snow forts as kids or some such... Anyway, I ask her, "so you and your BF are pretty serious now, eh?" She hesitates a little and says, "yeah I guess, 4 years..." I say, "wow 4 years, I didn't realize it had been so long." I bring up the fact that when she first started going out with him she used to cut him down pretty bad quite often around me and that he must have really grown on her. Again hesitantly she agrees sort of... I'm thinking great, this girl is still into her BF and she's just been flirting with me because she thinks it's a fun hobby. She touches my hand again (accidentally? 4 times?? really?). She tells me that he's working second shift and she never sees him anymore because he goes in before she gets home and comes back after she's gone to bed. She tells me that she's upset with him for taking a 2nd shift job, but that she's trying to be supportive.

Part of me would like to further our email discourse and just tell her that, "hey, you probably already noticed, but I've got a bit of a crush on you. I know you've got a guy at home, and that's cool, but if you ever need a break from him you can consider me interested." - I guess that sounds a little pathetic, eh?

I'm a bit depressed today... Not feeling very optimistic at this point. I'm pretty much just resigned myself to leave her alone until she approaches me. And if she doesn't, than so be it.

What do you guys think? Thanks for the excellent advice.

EDIT: I didn't send the email... I'm nothing if not cautious. So I made sure to give myself some time to think about it first. Sure enough, tonight at about 7pm, while getting my Z pulled out of the goddamned snow bank in my driveway, I came to my senses. Not because I'm a PUA either... just because it sounds lame to me at this point. I'm not a PUA... I'm just looking for some advice.

And thanks everyone for not moralizin'