This girl isn't really acting like her intentions are honest.
I mean, she's doing everything she can to keep you hangin on the end of the line, sitting around trying to figure out what she's up to and what she wants. In reality, she's playing perfectly into your insecurities.
You think it was any accident that she told you about her fvck buddies? No, no way she would have revealed that information unless she knew it would trigger that desperation in you. She was expecting you to react the way you did. Most guys would be pretty put off by that, and leave - and if she was afraid at all of you leaving, she'd have witheld that statement to avoid it.
So what did you do that gave her the impression that you wouldn't stray? You may be asking yourself this same question, and my answer would be that, most likely, you simply failed to see the fishing line and the hook when she threw you a little bit of bait, and took a healthy swallow of her bs and now your hooked. What I mean is that she probably played attention games with you - allowing you to get somewhat close and then pulling some stunt that either required you to chase her or hinted that she'd leave, and you played into it perfectly. For example, maybe she broke down on the phone "I'm just not sure I'm ready for (variation: I deserve) a man who treats me well" and you jumped into the trap telling her "Of course you are! And I am that man!"
That example is just one of many games girls play, but think back if there was ever a time when she seemed unsure about whether or not anything really should happen between you two and you took the role of trying to convince her. For the record, this should never happen.
Especially unnerving to me was her statements saying that she would see if you are worthy of dumping her FBs over. Did you really respond to that? That was a blatant game, the kind that attention wh0res play with guys that they're never going to fvck. I can't tell you how many times I've seen that game result in the guy being reduced to a pile of emotional baggage and the girl telling everybody how he's a desperate loser who she never liked, and nobody knows the difference because they weren't around to see her lead him straight into a brick wall. I can tell you, however, that I have never seen that result in the guy getting the girl. Never.
And now you're trying to salvage this by telling her things like you did above, that you will see how things happen and you have other girls blah blah blah. It's all just talk, and talk is cheap. If you want to convince her of anything you have to do it with your actions. This is hard, especially with her being 3000km away, but the fact of the matter is that saying that you have other girls banging down your door is actually telling her that you don't, because if you did you wouldn't have to say so nor would you be putting up with so much drama from one that isn't even right there to please you.
If you want to see what she's really after here, she has to really believe she's losing you. You have to show her that you're not very interested, and make her feel like she has to convince you that you really want to go out of your way to meet up with her. Right now it's the opposite, and you're doing all the convincing. If she thought she was losing you, she might act different. If there really is any interest there, she'll come after you, and if you play the game right you can flip the script so that she's the one trying to prove herself. The first step towards this is being 100% willing to lose her.
And here's a tip for the future - don't discuss relationships before they have actually become relationships. All of this serious talk about what you might become seriously sucks all of the fun out of it, and really tends to ruin it before it even begins. You should be playful and flirtatious, and try to avoid serious discussions of "what are we" when you really haven't become anything yet.
You want to play her game? Ignore her, but make it seem like you aren't. Send her a friendly text message that you wont be able to call her today, and drop of the face of the Earth until tomorrow. Call her at the busiest place you can possibly manage to put yourself, prefereably with female voices surrounding you even asking you questions (even if this means hanging out with your sisters - let her imagination make it something else) and be really friendly like you really want to talk to her, but just can't.
Actions speak much louder than words, and this being unavailable yet sounding interested at the same time will knock her off balance, as she'll be conflicted - she'll feel instinctually by your actions that you're withdrawing, but your words will cause her to doubt herself, and she'll go crazy trying to figure out what the hell is going on with you. Saying your not available and acting available will seem like a cheap trick to seem uninterested, but she'll never think you're just playing if you act interested. She doesn't have you pegged as that kind of guy.
If you do this, and she has any interest, she'll start trying to figure you out, which means calling you incessantly, texting you and trying to get you to come back to where you were. You must not drop the act. Stay friendly, tell her to calm down that you're still around and laugh at her, saying it's cute that's she's getting all concerned considering that you haven't even met yet (implying she's desperate for you). Keep up this hard-to-get attitude, and she'll be dying to see you when you get back.