Fantastic stuff. Thank you for posting this!
I will say outright that I prefer the theme to the variations. However, I tend not to be a fan of Theme and Variations in general, so don't take it as any form of actual criticism.
It sounds to me like the 'real ending' has yet to emerge from your subconscious! I have dozens of pieces which lack endings... my treasure trove of unfinished works is always growing. I see it as being good source material which I can come back to at any time in the future when my ideas on musical structure have developed further.
I think this theme has some real potential. Keep working on it, as in, keep working on what you want to do with it!