Well said Rebecca.
I would also consider his insecurities with you forging ahead with a new venture, becoming more independent, etc.
Don't get me wrong - if you want to go to school then congrats and good luck to you! But I would have a good sit down with him, make sure all of your feelings (and his) are out on the table, and make him feel involved in the decision. After all, you can't do it by yourself. He (hopefully) will provide you with alot of the support you will need.
I remember, at graduation, looking at my hubby in the audience, and feeling so proud of him. Of the extra duties he took on, of the sacrifices he made, of the extra hours he worked. I could see as much relief on his face, as I felt at that moment.
Only one person walks the aisle at graduation, but nursing school is a group effort.
I wish you all the best and welcome you to nursing!