new relationship question

I've become close with an old acquaintance, someone I used to have a crush on but was too chicken to make a move on. We were not very close at all before, and over the years have lead our own lives. Recently we've reconnected, and are both unattached at the moment, and have been spending a lot of time together, even had a "friendly" valentines date, where i worked up the nerve to tell her I was and am attracted to her. She said she was hoping to not give out the wrong signals, and that she is not ready for romance... we got to chatting and I apparently did so good a job of being a chicken and repressing my desires that she thought I didn't even like her. So we blew past that issue, and she knows differently now, and since then has said she isn't ready but that she is open to her own readiness changing. Since then we've been hanging out a lot, have talked about everything, I blab on and on and she listens and shares some of her thoughts... I'm firmly in friendzone territory, which is where she made it clear was the only place for me at the time. And I thought I'd be comfortable there because sex is the last thing on my mind when I'm around her, but I'm finding myself so drawn to her, want to flirt, and show her affection and am craving physical touch (not sex, just contact). And I get the sense that she doesn't want me in the friend zone, she is initiating all kinds of ideas for things for us to do together and she seems to be as addicted as I am in each other's presence, but a part of me also feels like I'm draining her energy - yesterday we visited and I had something to do and she suggested we informally get together afterwards, but then after she said she wasn't feeling well and just wanted to have a sleep. She works shifts and her sleep schedule is unique, so I didn't take it personally, but I can't help but feel I'm draining her energy which is totally not what I want to do. I was about to send her a short message asking if everything is ok, and to call me to chat when she has some free time, but I don't want to make any more drama than necessary, but I'm not sure what to do. My senses tell me I'm doing something wrong but I have no clue what the appropriate course of action is (do I escalate or do I back off). I feel like her actions are telling me to pursue, and I want to escalate, but her words on Valentine's day shut that right down so if I did she would say I was not listening and I would feel very selfish. You will all tell me to stop thinking so much, and my friend would too. but then how do you choose the right course of action?

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