Kel, to answer your question about levels, one of the "addicting" features of WOW is that there is no end. There was an expansion released a few months ago that increased th elevel cap from 60 to 70, but the game changes once you hit level 70. It's called endgame and the play style changes from working on your level to working in large groups in very difficult dungeons in order to find better equipment. There is a large social aspect to the game as well. Many people opt for the WOW social relationships over real life ones which is where many of the I Hate WOW perspectives come from.

Kel your situation isn;t bad at all. Long distance relationships are really hard and one could speculate an inevitable decline in communications. This doesnt mean that he is not interested but rather it's hard to keep a phone relationship.

You should bring up WOW and your concern that you nitice his involvement in your conversations has declined. I don't think he has a problem with it otherwise you would never talk with him. In face if your willing ask him if you could join him in playing the game. That way you can have your conversations and have fun together playing a game.

Either way best of luck. :)

Kel- my thoughts and advice:

1) Talk to him openly and honestly about how you feel. Express your curiosity in his pastime. In a lot of ways, WoW is very similar to many of the methods you have already been using to chat with him, most likely. Think of it as a souped up chat interface and go from there. Perhaps it is something you can enjoy doing WITH him, rather than lamenting the time he spends away from you.

2) Understand some of the mechanics behind these games. Games like WoW are quite often not played alone. Most likely he is a member of a larger group of players. He probably has friendships with many of the players, and in the same way he might arrange to chat with you at a certain time, he probably arranges to play with them at certain times. During these times, he may be occupied for an hour, or for several hours. But it is important that you know and understand that if he leaves prematurely during that time, it could mean that everyone he is playing with (5-40 people) could have to leave as well, depending on the make-up of classes and what role he is playing. It could also mean he loses out on something he'd really like ot have. It's also important to understand that these things are usually scheduled, which means your time with him can also be scheduled around them.

3) I think you should also think long and hard about whether it is the game that is distracting him, or perhaps just the natural progression of the relationship. In spite of his professed interest, perhaps the flames are starting to die down a bit, pr perhaps the relationship is going through a lull. It happens. And while playing WoW may be a symptom of a relationship in a downturn, I would say that it is rarely, if ever, the cause. (Although I'm sure to get quite a bit of flack for saying that here)

So: a story, to give you some food for thought and encouragement:
D was heavy in to Everquest when I met him (This was before WoW), but I didn't know that. He lived with two other guys, and it was not uncommon for them to get home on a Friday night, and literally stay up playing until Monday morning when they went back to work (silly, I know). For the first month and a half or so that we were dating, I saw the other guys playing sometimes, and I knew that when we were on hte phone talking he was sometimes playing, but he NEVER played in my presence. And then the "new" wore off on our relationship. I came up to the apartment for date one time, and had to wait for over 30 minutes while he finished something up in-game. Then I had to wait for him to get ready. I know, many women would have yelled and screamed, or gone home and moaned their fate after the date. Instead, I asked him if I could play.
It's seven years later now, and we are quite happily married. We play or have played Everquest, EQ2, City of Heroes, SWG, and WoW. I'll admit, he plays 2-3 times more than I do to this day, but because I understand how the game works, and enjoy it myself it less irritating. (Not that I never get irked when he comes to bed at 5am, just as I am ready to get up ^_~) We have many friends that play, and when we got married two years ago, had friends that we met through games come in from all over the US to be with us.