This was a great story. I loved every sentence of it. But I can't help feeling that it wasn't the end especially because it didn't say so. If it is the ending than it was a very tearfull and romantic story. But if it is not than I await more.
It's an interesting idea to pair off Eowyn with one of the Elves but timing-wise it's not very accurate. At that point she would have already met Faramir and fallen in love with him. You make no mention of him.
There are a lot of rhetorical questions out there. Watch out for those. Also, don't repeat yourself quite as much. You stated already that Elladan relied heavily on his twin brother (incidentally, "twin" is always spelled with a lower case "t"). There's really no need to repeat yourself.
Nice story, I feel bad for Elrohir and the choice he going to have to make and if he chooses to stay well I feel bad for elrond and his wife who will now lose 2 children and that all depending on Elledan. Anyway good chapter it really makes you think on what the inpact of his decision could mean.