At 12 months, you should really still be in the honeymoon period. A relationship should always be fun, but as you are still getting to know eachother, time spent should be fun, exciting and still hold an element of surprise.
To be brutally honest, it sounds like he is not as keen as you want. The best advice I can give is dumped him first, save some grace. I know it is easier said than done, especially if you love this guy, but if he has this desire for detachment now, where can the relationship possibly go?
After you dump him, he may come running back like a lovesick schoolboy. If he does great, you will then hold the cards and show him the relationship is worth trying for. If he doesn't, then move on. Have a little cry, cry a bit more then go out and find a decent chap to whom you can build a future with.
Why waste you time with somebody not 100 percent committed?