No. it's different. COMPLETELY different than that. When you've been going out on dates for about a month and a half, holding hands, cuddling, and on one of the most memorable nights of your entire pubescent life (pram) she tells you that she's not into you anymore? Fuck that shit man. THAT is leading on at its finest. There was LEGIT mutual attraction, not some subtle bullshit like "oh teehee she laughs when i try to be funny" or "look we made eye contact."
FUCK THIS SHIT SERIOUSLY
I can really empathize with you here. The most traumatic experience in my recent life was very similar to this. Since I don't have the time to type an essay about the situation, I can summarize. Basically I thought she was my dream girl, and I her dream guy (as is what she told me herself). And things were going awesome and we got to the point of exchanging "I love you"'s even, until one day she just disappeared. For a month. Without communication of any kind. I couldn't go to her place because she lived in a private condo and I called somewhere close to 200 times within the first week without being answered. I can't fully convey the horrible things I felt, and it has left marks which I still deal with these days (this all happened about four years ago). The punchline of the story is that I found out on FACEBOOK of all fucking places that she was now with a guy she was working with, and had been for the last few weeks of our relationship. That was the first time I realized what people meant when they were heartbroken.
Since that happened, I've had big issues with being led on. Any time a girl shows interest in me now, my first reaction is that she's just suddenly going to stop liking me, and then move on to the next guy. It's an automatic feeling, and regardless of how irrational I KNOW it is, it's always there.
My point (yes I do have a point) is that I don't think anyone should ever feel this way, and so if it makes any difference to you, don't let this affect you the way it did me. Don't sit there and question what it was about YOU that made her change her mind, because it wasn't you, it was her. Seriously. BUT I want to also say not to expect it to happen every time, because it WILL interfere with any future relationships if you do. And this is something I have to reassure myself every day: a girl who can change her mind about you at the drop of a hat is not a girl you want to be with in the first place. She might seem like the most awesome girl ever in other aspects, but the mere fact that she is like that should be a sign for you to stay away.
I should also mention that most girls in high school are just that: girls. They're indecisive as fuck, promiscuous, emotionally immature and just confused about what they want (this could easily go for high school guys, too). I'm not saying they're all like that, and I'm not saying all the ones who are get better with age, but having been out of high school for 6 years, and now meeting girls in my age range, I can say that it gets better, and much less dramatic.
I know that there's no way you want to wait half a decade to meet someone who won't fuck with you, so all I can say is just KEEP ON TRUCKIN.