So, for a quick backstory about the situation, I'm gonna do a little explaining.
First, I am VERY new to the PUA world, but I'm loving it. I've been studying, reading, testing, and repeating all of it pretty much daily. Some of the material on here fascinates me, not to mention, getting a girl every now and then doesn't hurt. But, like I said, I'm VERY new, and I have a few problems.

First problem, crazy ex won't leave me alone. I've seriously tried EVERYTHING that has come to my mind to get her to leave me alone, but she isn't having it. She always comes back, begging and pleading and pissing me off.
Any suggestions?

Anyway, and this is the problem that I REALLY hope to get addressed, my second problem is that I recently did a little testing via cyber game, and it worked. REALLY WELL. I sent the girl (easily HB8 - 9) a quick message on facebook, and literally, her very next message consisted of asking me for my number. BLEW MY MIND. My ex is a 3-4 MAX, so immediately I had a little hope.
Correction, a LOT of hope. Anyway, it's been a little over a day since this happened, but I've already hit a major bump in the road. I CAN'T TEXT. Now, things should get a little easier when insurance pays off and I can buy myself a car, but I won't be driving for another 3-5 days or so. I'll post the conversation so far, but keep in mind, I'm better with natural, face to face game. Expect this to be ridiculous.

(Yesterday)

(Five minutes or so following the number exchange online)
9:44 PM HB: Hey its juls!!!

9:49PM Me: Julie!! I'm guessing you know who this is...

9:50PM HB: Of course lol. So how are you doing?!

9:52PM Me: I'm pretty good, actually! Lol, what about you?!

10:18PM HB: Thats good to hear im doing fine! cant believe u remeber me lol (Sidenote: She transferred out of my school 2 years ago, we were both in debate)

10:27PM Me: Hell yeah! Of course I do! I had tons of fun with you in debate and that Honors English class! (Another sidenote: I have selective photographic memory, so I remember faces/names easily.)

10:31PM HB: Lol dude i remember that time we made stories out of drawings on the bus to our competition!

10:33PM Me: I know! All of us seniors STILL talk about that.

No reply. :/

Today, I didn't fare much better...

3:01PM Me: Juls!!!

3:11PM HB: Hey whats up dudeeee??

3:12PM Me: About to go shoot some shit! You?

3:18PM HB: Lol that sounds like fun i love shooting shit. Im just gettin ready for work you know daily routine lol

3:27PM Me: Oh hell yeah! I'm actually in between jobs right now. (One more sidenote: In case you haven't noticed, we're both in high school, so that's not a huge deal.)

3:29PM HB: Where were you workin? I make pizzas:/ lol

3:33PM Me: A place out of town. I sold meat. Had to quit for debate. Lol

3:37PM HB: Lol meaaaaattt. Yeah id say debate would be a lot more fun haha

3:42PM Me: Hell yeah! It was too. I wasn't missing state for that shit.

Again, no reply. Any suggestions for how/when to restart a conversation? Plus, once I do, how could I go about keeping it going? I'd really like to make this work. She's gorgeous, and I had a bit of a thing for her when she still went to my school. She's only 15 minutes away now, so, like I said, when I get a car again, this won't be as big of a deal.

Any help is appreciated!

You seem to be lacking two skills: a) the basic skill of friendly conversation, b) the more advanced skill flirtatious conversation. Firstly, all of the work in this conversation was done by her. You do not appear interested in her, nor do your answers show that you are having fun talking to her. So change that. If you are able to do friendly conversation, you can try your hand at flirtatious conversation. In my view, a flirty conversation has the two additional ingredients of teasing and sexual innuendo. So add a sprinkle of that as well.

Examples:
- Ask her something interesting. So you make pizza's? What's your favorite to eat? Is it also your favorite to make? Do you make drawings on the boxes on request? Can you draw me a Nyan cat next time I order a pizza?
- Tell her something interesting. I went fishing the other day and caught a) a boot, which I am currently wearing, and b) a small fish, which I used to slap [some mutual friend].
- Tease her. I can't believe I remember you either! No of course I do, we had tons of fun in [blablaba]
- Sexual innuendo. So you like meat huh? Wanna try some of mine? (I was talking about my pork chops, you dirty girl.)

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One of the most useful things you will ever learn about body language.