I approached this chick at a shopping centre a while back, and went on what was supposed to be a quick 10 minute insta-date because her friend had to drive her home. She ended up staying longer than expected (1 hour) and asked her friend to leave first, but in the end I couldn't pull as logistics were not great and I had to leave.
Anyways, we exchange contacts, and intermitently contact her to meet but our schedules don't seem to match up.
So eventually we do set a time and place to meet. Then the night before the meet, she texts me in the middle of the night saying that she told her boyfriend that she was meeting me, and got into a really big argument, and that she's in a bad mood and doesn't feel like coming out anymore.
I was pretty shocked because she didn't even tell me she had a boyfriend previously.
Anyways, I text back acting as non-chalant as possible, saying "it's too bad, it would've been really fun...etc" and gave me 2 cents saying she should do whatever makes her happy and just left it as that.
I would like to somehow get in touch with her again and see how far I can take it, but I have no idea how.
Should I still pursue? and if so, how?
Or have I already fucked up and I should just let her go?

I'm very curious as to how you think you fucked up in this particular situation.

_________________
I know my place. It's me on top of the world.

My in depth texting & dating guide.
There's no such thing as shit-tests.
How to keep a girl.

Just by going on the fact that she has not replied anything since my last text.

Does it even matter at this point?

_________________
I know my place. It's me on top of the world.

My in depth texting & dating guide.
There's no such thing as shit-tests.
How to keep a girl.

She is using you to keep her uninterested boyfriend in check and invested.

She has your number, there is not much you can do really.

_________________
USER HAS BEEN BANNED FOR REPEATEDLY IGNORING MOD WARNINGS AND MULTIPLE RULE VIOLATIONS

Thanks for the insight Dragula. Pretty manipulative stuff if its true.
So Im guessing the consensus is move on without any future follow up.