Anyone that is in the military and has a high risk job, whether it be as an infantryman, a combat corpsman/medic, EOD, etc, has a higher chance of being injured or killed. That is just a natural fact.
Right now, people in those high risk jobs are being pulled out of Afghanistan. While some remain there, there is a good chance that his deployment will be cancelled. By 2014, all of the Army and Maines in Afghanistan will be minimized, if Obama keeps to his word.
What rank is he? Which rank he is could be the deciding point on if he is indeed out defusing bombs, or if he is more into the command structure of being the Lord Hoo Haw of his section.
Also, with the advancements in IED detection, his chances of coming back all in one piece, with nothing missing, returning alive is much better than this mess started up.
I am not saying that his job is not dangerous. It is.
However, it looks as if he does his deployment, it will be his last one, because of the drawdown planned for over there.
You are not alone in watching your troop going over to put himself in harms way. I would suggest that you go to the forums on wives and girlfriends, as soon as possible.
Good luck to your boyfriend, and also to you!