You feel like your spouse is controlling what you do or stopping you from what you want to do.
Dreams are pretty subjective, and without any other details about the dream or about you or your relationship, it would be hard to say for sure. Usually when I have dreams like that they are exactly what they seem to be, you believe that your spouse is trying to kill you in some way like with stress or irritation. It most likely means you need some space for yourself to relax and think about what's going on. If you are actually afraid for your life, though, please seek help.