pondering about the puddle

As I read, I continue to be struck by how beautiful most of the passages are.  In particular, I am drawn to the following passage by Rhoda near the bottom of page 45.

"I came to the puddle.  I could not cross it.  Identity failed me.  We are nothing, I said, and fell.  I was blown like a feather.  I was wafted down tunnels.  Then very gingerly, I pushed my foot across.  I laid my hand against a brick wall.  I returned very painfully, drawing myself back into my body over the grey, cadaverous space of the puddle.  This is the life then to which I am committed."

This whole series of events was confusing to me at first because it was hard to distinguish what was real and what was imaginary during my first read through of this passage.  I believe that from the point when Rhoda's identity fails her until she pushes her foot across occurs only in her imagination.  Rhoda has trouble connecting to the real world, which we have seen in examples like when the girls went to put on their tennis outfits.  This difficulty in connecting can explain how something as simple as a puddle can push Rhoda into a flurry of thought.

There are so many directions that I want to go in while discussing this passage - the sensory details, the connection to water and thus the title, and the different types of short and long sentences, but I will stick to the part that caught my attention the most which is the use of "we."

Rhoda came to the puddle, Rhoda could not cross it, identity failed Rhoda, but WE are nothing Rhoda says.  Is this "we" in reference to the girls, to the girls and boys combined, to the characters and reader as a whole?  How can Rhoda, the girl that can't connect to the outside world, make such a bold claim?  At the end, Rhoda concludes with "this is the life then to which I am committed."  Why is it not the life that we are committed to as well, since we  were included in being nothing?  One way of looking at this I believe is through Rhoda's perspective.  She recognizes that she struggles with identity and perhaps rightly calls us out on all being nothing, but at the end of this passage she realizes that her life will be in constant flux between her imaginary world and the real world, unlike most people, thus committing her to a life that others do not live.