Moving across the country but no engagement in sight

My boyfriend and I have been long distance pretty much our entire relationship. When you know you know, we both know what we will one day marry each other. We have been together over a year and he is in the military. Jan 2018 he is moving back to his hometown across the country. He refuses to get engaged before we live together for at least a year. I just don't feel comfortable flipping my world upside down without commitment from him. It's just something I'm not personally okay with.