I have had similar anxiety, poetry. Detachment is something that takes a lot of practice, and at first it feels very unnatural and anxious.
These are new skills you're exercising, and new reactions you're getting.....both very different from how you're wired.
All you can do is keep practicing. Get on with your life, with your day, and let this go. Breathe in, breathe out, and let her take her own journey. Get a secondary lock if you're thinking she'll invade your space. Change your routine a little if you think you'll run into her. These small evasive maneuvers shouldn't interfere with your main task, which is to LIVE YOUR OWN LIFE AND LET HERS GO.
Big hugs,
GL