You're slipping up. Stop getting caught up in her, let's evaluate:
You are now the chaser, instead of being chased. Suddenly, as she starts to roam away you start to become more needy and willing to make things work. This is the exact tactic of a takeaway, but it's a longer version that makes you feel inferior to her. Don't allow her subtle hints of disinterest spike your interest when she's not even giving you the time of day.
Don't text her again. In fact, unless she reaches out to you I don't see any reason to keep trying with her. If you do this, the only way you can move is forward.
"The mind only acts as an enemy for those who do not control it."
You only lose what you cling to. -Buddha
Here's how I see it:
Men act, women react. Don't take the woman's role.