Hi Rainbow. I am glad to hear you know it's ok to cry. Intense feelings need an outlet. You were enjoying your walk, thinking nice thoughts about how genuine and great T is, sounds lovely.
Then your thoughts changed, then your mood changed. But do you see, nothing (no rupture, termination etc) NOTHING had changed with your T during your walk.
So put your tennies on and go for another walk. Go with the intention of remembering all of the wonderful wise ways your T is there for you. Your T sounds really smart.