How to deal with an avoidant girlfriend?

Anonymous
I was dating a girl for a while early this year, and this summer we broke up because of arguing, but for some reason we recently started hanging out again and things are much better between us now.

The thing is this girl is an dismissive avoidant. (She knows it herself, it's due to some childhood trouble) She can be incredibly intimate and in love with me for several days, have lot of sex and cuddle and flirt all the time, but then she shuts down and needs several days without even seeing me or texting me. If we have an argument, her way to deal with it is to withdraw and being alone, my way however is to cuddle and do something nice together.

It's hard to not take it personally, even though I know it isn't. My attachment style is secure, but I'm noticing I become somewhat anxious because of her behaviour.

She doesn't want to label us gf/bf because of the responsibilities that comes with it. We are however 100% exclusive (she wanted it), and we do romantic stuff, so we are basically gf/bf just without the label. I see a future with this girl, I think I even could say to her that I love her at this point (although I won't).

I really want to learn more about how avoidants think and feel, I think it will help me understand this girl better. Any avoidants who want to share their thoughts, or anyone with experience from being in a relationship with avoidant girls?
How to deal with an avoidant girlfriend?
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