How do I know if she’s actually invested?

Jane (27f) and I (32m) met on Hinge a few weeks ago, and after talking for about a week went on a proper date, with two more that have followed since. She’s attentive, upfront with her intentions and boundaries, forgiving, and smart as a whip. She’s told me I’ve exceeded her expectations, that she’s surprised at how comfortable she is around me, and in that she has showed me parts of herself she keeps regularly guarded as a result. She laughs on our dates, reciprocates hugs and kisses, and meets me halfway financially.

However, there are some things that make me concerned that she’s not truly invested. She rarely ever initiates texts or date plans, and so far will often resist date plans— not unwilling but takes convincing. More than anything, she rarely reciprocates “get to know you” chit chat beyond the first few days of conversation.

After some careful probing she has no intention of keeping this casual or a fling or anything. Am I missing something here?