Aaaaaand you're out.
Re-read what she said: "Socially i decide what to do that day." In other words, if nothing better comes along, she MIGHT decide to see you. And like I always tell guys,
you should NEVER accept a "maybe" date from a woman. The fact that she doesn't have anything planned at the moment but is already telling you she may blow you off should be a HUGE indicator of her interest.
Other mistakes you made:
1. Giving her your number - it should be the other way around: you ask for HER number, and she either gives it to you (high interest) or she gives you some excuse as to why she can't give it to you (low interest). Then, once you get it, you CALL her up and ask her on a date - no texting.
2. Your weak date invite - the presentation was awful. "I'm free this week" - great, now she knows that you have nothing else going on in your life. A better way to present this to her: "Well, if you like bowling, we should meet up sometime this week. I'm currently free on Thursday and Sunday, what day would work best for you?"
3. Not asking her for a definite time - anytime a girl gives you the "oh, I'm so busy" excuse, she's probably blowing you off. However, there's always a small chance that she just can't make it on the days you mentioned. So, to figure out which one it is, simply say "okay, well tell me - what days do you have coming up where you are DEFINITELY available." If she's in school or likes to work out, those are things she will typically have scheduled in advance throughout her week. So, she should be able to fit you in - think about it, even a girl that goes to school and works out has to make time to eat, right? So, if she gives you a lame answer like "gee, I don't really know any definite days when my schedule is open," she's lying to you because she doesn't want to go out with you. I've dated doctors, lawyers, scientists, and grad students, all of whom found ways to make time for me - if she can't find time to go out with you between schooling and working out, there's a reason for it...