Hi Brrian
I'd like to welcome you to the community I'm glad you found us though sorry what brings you here. Your current situation sounds similar to what mine was in 2015 (BPD/Depression/Anxiety), and your daughter appears open to the diagnosis, to talking with you when she's open for that and says she wants to get better. Your approach seems similar to that I've taken. You are right to be patient (now my middle name ), this is a process and recovery/management happens at the pace that works for our loved one. We can't change them though we can make personal changes ourselves to provide emotional support to their journey. The site has a lot of communication tools that can help a lot and great support and understanding from parents.
Brrian I certainly relate to how you feel your anxiety rises and falls with how you perceive her to be is understandable, it's a hard place to be and requires management, you are following her emotional suffering, it's easy to get consumed. This is where we need to put our care first through the tools and lessons here to your right, lead by example,

. I learnt this is no race it's like preparing for a marathon and requires strength and balance. Have you considered counselling or therapy to help you through, many members have found this helpful.
I want to share this workshop with you I found helpful
1.06 Radical Acceptance for Family Members (DBT) Mindfulness is woven throughout all of the DBT skill modules such as the distress tolerance module on accepting reality and emotion regulation on letting go of emotional suffering.
Welcome again, let us know how we can help, we are here to support you through.
WDx