oh. man.
i am sad because i just read all of it.
um, i wish i could help you with the ending or how to write it, but like F.G. said, you probably shouldn't force it but it is easier to write if you actually sit down to do it. sometimes you have time where it just has to come out, like you're in your kitchen cleaning a dish and you just have to write something down. and other times you know it's in there you just don't know how to communicate it. just get start writing and don't stop and you'll get to the point eventually. I suggest narration rather then dialogue to get going but that's just me.
p.s. you're the best!