Dating a military guy who has suddenly became emotionally unavailable....

Hi, So long story short... I have been in a relationship with a military man for 2 years now. Everything was great until he went to afganistan for 4 months. Since he came back (approximately 8 months ago) I find he is extremely emotionally unavailable. He never asks how my day was, how i am, how my new job is going... I find it depressing how he does not take an interest in my life anymore. I do know he still loves me and wants to be with me, because he states how he would like to have kids with me in the future, how he never opens up to anyone like he does with me, how he finds it peaceful just being with me (like i have a calming affect on him). He has also opened up to me about events that happened while he was in afganistan. The sex is great but i am starting to find his physical touch is empty (like holding hands is just holding hands... there is no affection behind it). I do not feel loved in the relationship and many times i think about ending the relationship. I love him... or i love the person he used to be and I want to help him. He has been seeing a therapist since he returned however, nothing has changed or progressed. I fear he will never go back to the person he was and i cannot stay with him if it will be like this forever. Does anyone have experience with this? I would appreciate any advice. Im pretty sure i know what i need to do and that is end things... I just need to hear it from someone else, i need the reassurance from someone else that i am doing the right thing.

ask him straight out what has happened to change him, if he says he does not want to talk, tell him to see a professional counselor or you have no choice but to move on as your life will become even more unbeatable especially if you have children with him and he is disinterested in them as well