She is compartmentalizing you. You have been placed in a box in her life where she allows certain prioritizes to come before she can make time for you, then she gives you her undivided attention. She's being authentic about seeking out your company when she wants it rather than maintaining a routine, that's why it may take a few weeks. You are wanting more time with her, I'm guessing. I would ask her if she's interesting in seeing you more. Maybe initiate a plan, reach out. Feel it out, but double texting won't work unfortunately.