For a while I have known a girl that has a boyfriend, I've always liked her though I never made a shot because of that. Although, all the time I've known her that she has been with her boyfriend, she always complains about him to me, she says he never has enough time to see her, he works on another city, and all of his money is spent paying a car credit, she also says that her boyfriend says he's not ready for sex yet, seriously?? She has told me their "sex adventures" and its like they never have sex, he's fat and ugly. And I always said to her, well why are you with him then? I don't remember hr exact answer to this, but through a lot of months she was like: Im not the stupid in this relationship now ... etc ...
Anyways... I started dating this girl, it was totally unplanned, but she has been inviting me out for almost 3 weeks, and 3 days ago I finally agreed to meet her. We went eating, and we kissed a little on the restaurant. I ran the cube on her and said I was dead on spot with the fact that she has had weak man in her life.
So, we made plans for a 2nd date, but she is still with him. I know she is thinking of leaving him, she really likes me, and said its been a while since she had so much fun with a guy, and is saying that we will have a lot of future andventures, and says she wants to see me often, she even invited me to Las Vegas in 2 months. So I know she is thinking of leaving her boyfriend, for me, but the question for me is:
Should I ask her about it? I haven't mentioned her boyfriend, although she hasn't been keeping it secret, she has "on a relationship with ____" on facebook, and sometimes he posts her and she answers .. I mean, she knows I know that she has a boyfriend, but I don't want to ask about him yet. I don't know if its time.
Its only been our 2nd date, but the fact that shes making plans ahead, even of traveling to Vegas gives me a hint that she might be thinking of being with me.
So would it be awkward if I go like ... sooo.... are you leaving your boyfriend? Or mention him in anyway??

do not bring up the boyfriend! That is only for people in friendzone.

Keep hanging out with her and escalate it to sex.

What if I'd like her to leave the boyfriend and be with me?? Should I still not mention it and wait for her to do it sooner or later?

It's too early to assume anything, especially her "feelings" for you. Just play it well, have sex with her and let her leave her bf on her own. If she doesn't, then you can think about the next step or reconsider what you want from that girl. You can't push her to do it. If she's looking to upgrade, she will.

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rAFC and yes, I'm a chick.

I have bursts of being a lady, but it doesn't last long.

I'll do that, thanks. Im having sex with her this week, were going to a hotel to drink and smoke, obviously it will lead to sex. Last time I saw her we made out in my car for like 5 straight hours, not continuously and I fingered her.
Here's something Im confused about. Im actually not really sure if she is still with her boyfriend, she mentions him as an ex, we talked about it, although her facebook still shows her in a relationship with him, but his facebook doesn't link back to her. I will follow your advice and only bring this topic up if I feel the need to be with her seriously. But what could that be?