+1 on the above. You may have come off too needy.
First, you should always ask for her number instead of giving yours out. Just because you want to be in control.
Second, one of the most important aspects of negotiating a time bridge is to appear as if you are unconcerned and have other options. If this was done over a 48 hour period then you probably made it look like she was the only thing that you had going on.
Next time, ask for her number, dont give her yours...this adds tension...and wait at least 4 days to text her. Use something that references your conversation.
e.g. "That band we were talking about last week just came on the radio. I cant believe you like them..." Let the conversation develop from there.
This time...wait a whole week then text her something cute like.
"Hey...what's going on in your crazy world?" or "What up fool?" or "Poke anybody's eye out today

?"
Let the conversation develop and then make sure you drop it first. Something to the effect of "Meeting some friends in a bit for some coffee. Later."
Here is a thread that details a text conversation that I had recently that led to a successful day 2
1-vt67952.html?postdays=0&postorder=asc&start=0
Hope this helps, and of course the best medicine is to go out and find another girl!