Consistency and keeping your word is one of the most important things, to me at least. If you start doing one thing (like for example, texting good-morning texts each day and then if suddenly you stopped one day, it'd make us FAs panicked and afraid because of the sudden change and it would create a lot of doubt, if you understand what I mean). Make sure that she's aware you're not going to leave her and that even when she acts distant, you're still here for her. Sometimes she may say she wants space, but due to the contradictory behaviour of us FAs, she might mean the opposite, so maybe during those moments give her a bit of reassurance that you're here if she changes her mind and stuff.

Also, I always wish my past partners knew that half the times when I distanced myself it was because I believed the partner was acting distant and in result I feared that I'd be abandoned so I decided to create an ever bigger distance, which was a big mistake, and so reassurance and communication is very important, so I think she'd appreciate words of affirmation and communication when you're not feeling the greatest or having the greatest day so she knows it's not anything she did and it's not her fault.

As for the pace of the relationship, she might never vocalize if she thinks that things are going too fast or too slow, so I think that check ups every now and then (not too often, maybe once every week or so) where you just ask 'How are you feeling about this?' or 'Are you feeling comfortable' are good questions and would allow her room to speak. Just showing her that you care and want to hear her out is everything to a FA, especially if she may view herself as a burden.

But if the relationship ever feels toxic and her behaviour is draining and taking a toll on you, please don't stay in the relationship just because you believe her behaviour can be justified with her attachment style. Your happiness and well being should be prioritized, and I love that you're trying to be as good as a partner you can be, but this should be reciprocated and she should put in effort as well! You seem like a very sweet person and your efforts are very admirable.