Recently, a client shared with me the challenge she is having implementing a healthy diet for herself when her spouse is not interested in making changes. I quickly realized I had no experience in this area. What do you do in that situation? So I did some research. Short answer? It isn't easy.
First, you have to be very clear about your "why". Why are you doing this? To feel better, to move better, to get the most out of life. If you know your "why" you can bear almost any "what". Now it's time for a heart-to-heart. If your spouse doesn't support you at this fundamental level then, "Houston, we have a problem". Your spouse doesn't have to eat the same as you, but they do have to respect your decision to do so.
Once you clear this relationship hurdle there are some practical tricks you can implement. When cooking meals use common ingredients to produce individual dishes. For example, when making a stir fry remove your chicken and vegetables from the pan before adding the sauce and rice to your spouse's. Designate a separate space in the pantry for your foods so you don't have to sift through unhealthy processed stuff looking for yours... and tell him, "Hands off", so you know it's there when you need it.
Over time as your spouse sees how committed you are and the positive impact it's having on your life, he is likely to jump on the wagon. But be ready to pull that wagon by yourself for a while before he is ready to make the leap.