An evocative track, it surely tells the story that you described. The central part is especially very emotional to me, that's the moment in which the brighter feelings of the journey kick in. I think you did a good work with the piano and having the guitar be only a support. It was a good choice and well executed.
One note on the mix, there were certain times when all instruments played at the same time and it sounded a bit weird, I think at 0.35 it even clipped. But in general the mix is also good. Good job!