Hearing the first few bars of this piece, I must say, the title is well-chosen. I would've thought this to be a film score had this not been an improv', but the fact that you improvised this makes it more visceral than ever. Might I add, I almost teared up within the first few bars.
I hear a I - III progression going on rather often, but I think it works well here, because that seems to be a recurring theme for this piece. In addition, you brought elements from what you played early in the piece, later on -- and thus, this could be a piece in its own right. I - III progression aside, I especially enjoy your chord work.
6:41 onwards spelt the definitive moment of 'goodbye', parting ways and looking at photographs and other momentos of the people we spent time with. In fact, this entire piece tells a story.
Thank you for sharing this with us. It was breathtaking.