Boyfriend asking about moving together...

My boyfriend and I have been together for almost 1 1/2 years now, and I've never met such a gentleman of a guy. I absolutely love my man and there's not a single other person I'd rather be with. It's currently a rough season because he's currently in basic training for infantry. We've been sending each other letters, which is encouraging and it gives each other something to look forward to each day. He's asked me about moving somewhere only if I go with him. And of course I love that idea for us in the future. I'm currently finishing up high school. Are these signs that he intends on proposing later on? Of course it'd be after I graduate, and I'd prefer that.