well honestly there isnt really anything u can do except wait until he comes back and he realizes he still wants to be with u. hate to say this, but if he really honestly did love u, he would have continued the relationship even though he was overseas. long distance is very hard so i see his point, but u guys still could talk on the phone and maybe visit occasionally. it could work, i've seen it..
Post about it, get some insight (which in the past has always been positive, and hence my encouragement to bring this to the LS community) and then approach you and talk to you about my concerns and worries..
intellectual deep open-minde..