So quick background before I get into the thing I actually get advice on.
Met this girl at a party/dance thing and ended up facebook closing (should have number closed but whatever).
Messaged her on facebook a couple days later after getting some advice from some guys on this site, ended up getting her number and talked about how we should hang out some time. Later that week we tried setting something up but when the day came she said she couldn't because she had something else (No big deal though we hadn't officially put anything in stone just like "maybe"/ "something" tomorrow) So whatever that was fine cause she ended up texting me after appologizing saying how sorry she was we couldn't go out and do something.
Now here is where I think I fucked up:
So now this week we actually tried to plan something serious but again, "Maybe" / "Something" even though we were at the point where we said we would hang out that night (we were texting in the morning) Unfortunately I had a family thing I absolutely HAD to go to and the worst part is I didn't have my phone the whole time so I couldn't text her saying like it wouldn't work out that night. So anyways I finally get to use my phone at 10:51 at night and I fucking panicked and texted her this word for word. (Its fucking embarrassing)
"Oh my gosh im so sorry im texting you this late, the family graduation party I went to turned out to be a lot bigger than I thought and im just leaving now"
She hasn't responded yet even though she normally responds right away. My assumption: I fucked up but I would appreciate some advice on how to save this.

You did fuck it up a bit. But don't worry. You came off as needy and indicated that you desire something that's why you are making an effort.

What you need to do is build some confidence

Don't talk to her for a week or 2 preferred


If you run into her or call her saying I guess I saw you but anyways talk to her general stuff and tell her there is this really cool place on x street (somewhere nearby) we should go there this x day or y day as I have to attend a function. So I'm going to call you a day before and don't worry I won't flake this time. Make it sound funny. be calm. Imagine you're fixing up plans with a cousin or childhood friend.

And please be creative and add your ideas too

Dexter,
What you said lines up perfectly with whats going on in my life I am actually leaving this Saturday and I will be out of town for a week so I actually wont have a reason to try and text her and set something up anyways. Great advice I'll definitely do something along these lines. If you have any other advice or insights that would be great but for now I'm going to freeze out like you said and see how it goes. Also, what should I do if she texts me, should I still be like funny about it or....
Thanks again.

If she texts you ignore it. Call her when you get back

Say you were out for a while. tell her something interesting what you did for the past two weeks.

If she asks why didn't you reply - change the topic. Continue talking about the interesting thing.

Do not brag - for example - I partied with 5 girls at a club. Something on the lines with I went trekking and saw something beautiful ... read it up. Make it an emotional experience

Gotcha, Ill see how it goes and hopefully let you know after

I relate to a similar story. Here is mine.
I met this girl at school. Everything was going great, but it soon escaladed to disaster.
We talked, hanged out, and ended up with her number. However, we never really went out on a date. It got to a point where we held hands and kissed. I was starting to fall for this girl. I was happy and she seemed happy. Now that school is over, I've been trying to ask her out on a date.
I text her, but two things happen. Thing One: She ignores my text by not replying back to my invitation.
Thing Two; She tells me that she's working and she's busy on the weekends. I'm beginning to feel that she's not into me anymore. I think I messed up and not sure if she will text me. I really like this girl and I want to work things out with her.
Can anyone out there share some advice? Will she text me?

Same dude, this girl is someone I would actually like things to work out with instead of just fuck and go.
Not trying to sound needy or like im putting her on a stand like a trophy, just being honest.

Well, at least you found out what not to do in order to seduce a girl . But regarding your issue, if you can do something to make it up to her, try it, but if the only way to get to her is through her phone/facebook and she doesn't want to talk to you anymore that makes things a little bit inconvenient.

Ya I'm hoping she forgets about it after I freeze out. But after that what should I do to make it up to her? I have a few ideas but I would love some input if you have any ideas.

It's best to leave it to your imagination/knowledge.