For the speaker of "Flare," the natural world is where it's at. Need a break from the hustle and bustle of your responsibilities? Frolic in a field. Need some solace from your sorrows? Take a hike. Want a moment of peace and quiet? Look long and hard at the nearest insect. You never know what beautiful surprises you'll find.
For the speaker of this poem, our disconnection from the natural world underlies most of our sadness and suffering. The main problem with lingering on the pain of the past is that it takes our attention away from the natural world around us.
The natural world is just an escape for this speaker. She may think it's solving her problems, but really it's just delaying them. Nothing a good therapy session couldn't fix.