Marriage ??

Jane
I've been with my bf for now 2 years. We've moved across country together twice already and soon he will be leaving in a deployment for 6 months while I'm here in Wisconsin waiting on his return. I so badly want to bring up the topic of marriage, but I don't want to flat out ask him if he wants to marry me. I simply want to make a few jokes around the subject so I don't seem pushy. I know sometimes that topic makes men feel wierd and don't want to bring it up to get that response. Does anyone have any idea of what I can say? We both know we see eachother as our future of course, but I want to specifically bring up marriage and commitment at this point..