<human>: Can you give me the gist of the text in a nutshell?

I've been with my SO for 8 years now. We love each other very much. We have pretty much spent all of our time together. 

Recently he has brought up the idea of him joining the Air Force. Knowing how he is I'm pretty positive he will join, although he is stating how uncertain he is. (Of course, it's a life changing decision)

We have been engaged for about a year now. He has told me, if he decided to go into the Air Force he wants to get married before basic training. He wants me to go with him wherever he goes. Which I'm totally down for. He obviously wants to marry me, considering he asked me before the topic of military even came up.
I still have two semesters left of nursing school to complete.(He understands this, and states he will wait until I'm done which would be may 2016) 

For whatever reason, I have been doubting our relationship? 
Even though he has never given me any reason to believe he would cheat on me. I get sad, and think about the stories I hear(cousin is in military)/or read about military men cheating on their SOs when deployed(although I know it could happen both ways). I'm not used to being away from him, and this would definitely be a life changer to both of us.

I was just wondering if there were other military wifes/husbands here, and how they handled this? Did you ever have any doubts? I guess any advice is wonderful. 

I know his decision isn't set in stone, but I just want to be prepared and have an idea of what might happen.
<bot>: Fiancé might join Air force. Doubting, although never given a reason to doubt/not trust. Any advice.?