So I K-closed the HB8 that came over yesterday.. I think I've underrated her a bit because when I saw her tonight, she looked more like an HB9 to me

I really can't read this one though. She is quite strange. She doesn't really flirt at all. It felt awkward during the last 2 dates with her but I wanted to see where this could go. She hasn't given me any perceptible IOIs that would allow me to kino escalate, so I never did up until yesterday. She never turns down a date and has offered to pay for some of them in the past. When I do try to make a suggestion to extend our dates for some time bridging beyond our original planned activities, she usually has to go home for dinner, etc. Even yesterday night, as it got later in the evening, she said she had to go because of an early start to the work week this morning. It wasn't all that late (11pm), so I know she was perhaps just feeding me a line.
I've also gotten the cheek during our first 2 dates when I moved in for the kiss, and it was my intention to next her tonight if things didn't improve. I still couldn't read her tonight, but I decided to start kino escalating with her anyways. Eventually, I got to a comfort level with me holding her waist while chatting with her, legs touching during dinner, touching her neck/hair and being within her personal space constantly. This definitely improved the situation because I felt that she almost wanted to give me her cheek when she left, but when I looked her in the eyes, she turned back and I got her lips. It wasn't a make-out session, but it was a decent close. The good thing about all of this is that the next time we meet, I'm already working off a higher rung on the ladder, so I can hopefully really start ramping this up. But I'm not sure if she is just someone that needs to move very slowly in a new relationship or she is just testing the waters using a shotgun approach so she can't give up herself too easily.
I've been setting up dates and not texting her at all in between and sometimes taking many hours to reply to her texts. I'm wondering if I myself am not showing enough interest for her to pick up on and she is keeping herself distanced in case I decide to bail on a heartbeat?
Anybody want to provide some pointers with this situation?
This is becoming almost like a journal, so I don't know if the thread should be moved elsewhere. But I'm taking all these comments to improve my chances to permanently move out of the afc zone. Thanks for all of your comments..