To be frank, after reading this several times I am still not sure what this poem is about. It is really a very challenging poem i.e. the details are known only to the writer.
But several questions and images do come into my mind when I am reading it. Who is she? How is she related to the writer? Is this a love story between a poor army guy and a rich girl? Or with a hostess?
The writer is clearly in love the girl, but is this a one sided love affair, as shown in ‘animated when you’re happy, dead when you’re down.' ?
I sense rejection, hapless, and even anger in the poem. But I think the writer is not going to give up without a fight as shown in ‘against the flow; the torrent i’m always fighting…’
And the last line ‘forever .. rolling …’, rolls to where? Rolling in the mist of human’s emotions? Rolling to death? Why roll, not walk or run?
This is only my guess; maybe I am totally out of point.
But it is still a good poem.