Sorry if this sounds harsh but you better hear the truth from someone:
You are stupid and naive.
Go ahead and follow your do-or-die-attitude, reality will hit you in the face soon enough. Hopefully you'll learn your lesson from it...
Look man, I'm not a master Don Juan but I am much more experienced in these matters, as you suggested yourself. You want me to elaborate on why I think she's gonna flake?
1. Personal experience. In my dealings with women I've found that 9 out of 10 times when a girl rejects my date proposal and wants to reschedule a long time into the future, she'll flake on me. It doesn't matter if she has a good reason like going on a trip, already having made other plans etc. blah blah blah. The details of all those girls' stories don't really matter, it's just simple mathematics: basically EVERY TIME a girl reschedules a date far into the future, she's gonna flake.
That's my personal experience and I know you are gonna try to convince yourself that I am not you and you are not me, so maybe in your case it's gonna be different blah blah. Go ahead, do what you want, I'm just giving you my advice...
Perhaps other guys here can confirm my personal experience and tell you they have experienced the same thing.
2. The Laws of attraction and interest. When a chick feels attracted to you and wants to be with you, she will find a way to be with you. Suppose it was YOU who made other plans for this weekend and going on a trip next week (or whenever the fvck this wh0re of yours is going on her stupid trip). Suppose this girl asked YOU on a date with her this weekend... I bet your azz that you would find a way to get out of those other plans you made this weekend, and if you really couldn't get out of that, you would at least find another moment this weekend, or this week, or next week, to meet up with her before you are about to leave on your trip.
You like her, don't you? You're very eager to go on a date with this girl! So you will definitely find an hour or two in your free time SOMEWHERE before you leave on your trip, coz you really don't want to have to wait more than three weeks to be with her.
But she isn't like that... She is not in a hurry, she is not very eager to meet up with you. If she was, you bet your azz that she would have found a moment to be with you before she leaves on her trip.
In other words, this girl has low interest for you. She is not looking forward to the 24th at all, I guarantee it to you. And when the 24th comes, she will probably have forgotten about this supposed date and she will simply not be interested to go on a date and make up some bullsh!t excuse at the time to flake on you.
Hence, I'm telling you to forget about this girl and this date that you're supposed to have with her somewhere in eternity, lol.
You have a scarcity mentality, you are so happy that this one girl showed interest for you in the past and you're jumping on this opportunity like it's the chance of a lifetime, like it's the only chance at "love" that you got. Which makes you outcome dependent, there's a lot at stake for you... If she becomes your girlfriend, it'll be happy happy joy joy for you but if she flakes on you, you'll feel very miserable and sad.
You need to grow the fvck up and see things for what they are. You did a pinky-promise hook with her that you two won't flake on the date?!?!?! Wow, you are still living in the blue pill world, where boys and girls fall in love with each other and live out Disney fantasies and high school romance like in the movies, all sweet and fluffy, with rainbows and pink hearts flying around.
If you're gonna jump out of a plane, you FIRST make sure that you have a parachute. If you're gonna deal with women, you FIRST make sure that you protect your heart.
You're not doing that. If you hope and expect to go on a date with this girl in three weeks and she then flakes on you, then your sadness and disappointment will be YOUR OWN STUPID FAULT.
Good luck with wasting the next three weeks of your life, my friend....
And to the guys who are advicing LDD on how to act if he gets a date with her etc. YOU ARE SCREWING HIM OVER. The dude has put his hopes on the 24th and his emotional investment is gonna grow and grow and grow in the next three weeks. When the 24th finally arrives, his emotional investment in relation to the outcome will have grown sky high, and when that outcome turns out to be her flaking on him (which is very probable), it's gonna mess him up big time!
Anyone who is giving LDD other advice than to put this girl and the possible date off his mind, is guilty to the disappointment he will experience when she flakes on him.