Good news everybody :)
I got to see the little guy this weekend and he seems to be making a rather unexpected recovery! He's getting his energy back and we've been fairly successful with bottle feeding him. My uncle says that his vitals are all returning to normal and that he should be fine, but he is going to monitor him closely since a head injury was what (most likely) started all of this!
As for the (human) boyfriend...not such a great outlook. But hey, horses are all I really need
Thank you everybody for the support! I'll keep y'all updated!