Let's just put it this way: Use text to set up a date and time to meet. That is it!
A couple of weeks is infinity when it comes to "text game", even a few days is too long. You get the number, you briefly continue the previous convo you had prior to text, and then you make the plans by taking the initiative and being affirmative. Do not even ask "Do you want to" or "are you down", don't give her a chance to reject you. Instead, invite her to your life. Meaning, I'm going to hit up this bar, or I'm going snowboarding, etc, etc. Let me know if you want to join me. That is it.
Hope it helps.
Modern Man Advice