I worry about stories like this.
It sounds really sweet and all, but do you want a guy who has probably had multiple opportunities over the past 11 years to say what he means/feels and doesn't take them? I mean, he is probably a great guy and all but there is something fundamental there that needs addressed.
On the other hand:
Had you not been leaving would he have said anything? Funny thing. He's either a masochist or maybe he really likes the IDEA of loving and being loved by you, but is not into the hard, day-to-day aspects of a relationship that is close-at-hand.
This sounds to me like a friend - a really close friend - almost a brother, even - but not necessarily a 'relationship'. Obviously he will miss you a lot, obviously there is love between you....but there is something missing here (that could appear with time and maturity) to keep it from being a whole lot more, at least right now...
Fear of pain and rejection is normal, though. Maybe he was thinking that if you didn't feel the same way, it would be easier to deal with if you were sitting on an ice floe in the Pacific, thousands of miles and several time zones away. The cat's out of the bag, now, though, and it really kind of makes it harder for both of you...
So best of luck to you in Alaska and he wherever he is. If it works out, that would be a great love story. If you remain friends forever, that's pretty special too.