Ah, okay, good stuff to know. Well, I've been in the position a few times of making a former crush who didn't want to hook up with me suddenly look at me in a new light and give me an opening to get with her.
So far you're doing good with letting her contact you to go out. By you not reaching out, she's probably wondering what (or who else) you're doing when you're not hitting her up. If you want to increase the effectiveness of this, you can also do the occasional rejection where you make her THINK you might be turning her down to go out with someone else, even if that's not the case.
For example: she hits you up one day and asks you to go to a movie or some other night activity. Instead of accepting her offer for that night, say something like "man, I'd like to go, but I have dinner plans that night. How about we go on (another day) instead?"
This will do two things: one, it shows her your time is valuable, and that she should be respectful enough to schedule time with you vs. assuming you're always available at her beck and call. Trust me, you do NOT want to get into the habit of allowing her to always be the one determining when you go out.
Two, telling her you have dinner plans without specifying what they are or who they're with will make her play her own head games with herself. She'll start thinking things like:
*"Who does he have dinner plans with?"
*"Why wouldn't he tell me who the plans were with? Is it a relative, another guy, or... another GIRL?!?"
*"Why wouldn't he change his plans to be with me instead?? Does he not like me as much as he once did??"
If it works the right way, she'll be working even HARDER to gain YOUR attention, to the point where you may end up going to her place one day, only to find her opening the door wearing lingerie and asking if you have some free time. (I'm saying this part from experience, lol.)
But yeah, so far so good. Just remember: in cases like this, patience is your best friend, but you have to also know when the right time to strike is. Once she starts bringing up sexual innuendos or finding you cute/attractive, don't question her or try to rationalize what you two suddenly are, just GO FOR IT.
And of course, as I always like to say on here, keep texting to a minimum. Use the phone only to set up outings with her, and wait for her to initiate texts before sending messages. Hope this helps!