What do you think of me having a constant anxiety about the future?
Oh dear, I am sorry to hear that. What about the future scared you?
I just am anxious about the future: I want to get there and am not sure of it getting there
It makes sense that you would anxious about something that you can know nothing about. You should try and do things that help you calm down when you're getting anxious.
I'm going to take a walk
Many people get to feeling anxious about the future because it is  unknown. I think you are doing a good thing to go get some exercise.