I actually made a post relating to this girl in another topic before but I'll do a brief background info again:

About a month ago I ran into this friend of my sister, who's HB9 and 4 years older. I overcame the age thing since afterall 25 and 29 really isn't that much of an issue.

Anyway, got her FB, got her number, got on to a date, good convo flow of stories and jokes, light kinos, never complimented randomly, totally confident and relaxed on my part. She seemed a bit nervous, not much eye contact from her part, asked to take her home since it's late (I told her I do this to every girl since it's my principle) which she refused(reason being it's really far; and it is) no close, rapport is there but I don't think a k-close is imminent.

We then talk on facebook every now and then for a week(really not a big fan of texting), i always had to initiate but I'd always keep a time constraint, while keeping it interesting and not just chit-chat.

On one weekend I asked her to join me in something to which she replied she's too busy. 3 days later, I messaged her and she didn't reply. I stopped any contact for a week. My life is too busy to be dating around randomly now, though I do keep in contact with few chick through facebook/phone, so my inner game is still there; no panicking or anything.

Just when I was about to next after one last try, she actually initiated. And it's about something I msged her from last week. Now it gets really tricky; i think that's an IOI from her part since it's rare to start a long left behind topic from a week ago. I told her I don't even remember talking about it. From this point on she starts to leave messages to reply and sign off in 5 minutes. I only reply when she does(I'd wait), but she's been doing the same thing. She could be signed on the whole time and then only leave messages RIGHT before she signs off.

I'm thinking I'm just gonna fuck it and call her at one point, but is what's happening above indication of anything? What should I do here? Next it?

Sounds to me like she had a good time, but you didn't build much attraction (but some). Right now, she's probably trying to guage whether you two have enough chemistry to pursue further.

In short, you need to get this girl out again, but you'd probably be better off if it wasn't a date (ie. Drinks with friends). From there, you need to escalate quickly, or what attraction there is will disappear.

Yeah, exactly my plan, but I feel like before asking her out another time I need a smooth conversation first at least, since it's been a week - which is why I'm thinking of calling since the FB game can't get into any rhythm at this point. It's really confusing, things would be much easier if I initiate again this week - since I can quickly decide if it's next or not, yet all of sudden here she comes and drag me into this on and off response thing. I'd appreciate more feedback on this.