They said some about him not being able to blend into human society after that. However I think the real reason is, that the blondie doesn't want him to suffer the same way he did, seeing a human he loved age and die before his eyes.
Haaa... for one sweet moment I thought he actually killed her husband... Geez... Getting my hopes up like that just to see them crashed a few pages later... I want the husband dead already (/TДT)/
I know he's just a kid, but Jesus Christ... that uniform is hot ლ(´ڡ`ლ)
You're right, I thought about that too ε=ε=(ノ≧∇≦)ノ