Unexpected happy ending! Ha! Anyways, very true, very true. I could see this idea being expanded just slightly to make the imagery be more of a man in the middle of a group, but really being in a little corner by himself. Because that's the reality of it - we're all really quite alone most of the time, even when we surround ourselves with supposedly close others.
If I have one suggestion, and if you're willing to take it, I might tweak the rhythm on a few lines, for the sake of flow. For the most part it has a nice flow, but then a couple spots seem to jar that a little - especially the third stanza. For instance, in the second line you could remove "and". It's not really a necessary word, and the line flows much better without it. The next two lines could be altered similarly. Off the top of my head: "Smile covering frown / Trying to look his best". Not the most elegant rewrite, but you get the idea.
This is fabulous! Very well written. The amount of thought put into each phrase is astounding! I enjoyed the idea of it as well. Very beautiful. Keep it up :)