I think "Do you have real compasion" should be the first question on any nursing school application. If you're like me, and your sympaty can bubble up in an instant and you cry when you read any "Chicken Soup" book, I can offer two thoughts:
1. You're going to make one excellent nurse!
2. Nothing out there will prepare you for the emotional rollercoaster that you'll jump on as soon as you start your first clinical rotation.
If you're older, you can rely on alot of your life's experiences to help buoy you thru. If you're younger, the learning curve may be a little steeper, but by no means impossible. Only experience will make you learn when a patient is sincere, and when they're taking advantage of you; holding the hand of a dying person will be hard, but holding the hand of a grieving spouse/child/parent will be harder; and looking into the eyes of a spouse/child/parent who doesen't give a damn that their family member just died will be the hardest of all.
Sounds like you've got a honey who'll support you fully. Add to that a deep, grounded, abiding faith that this old world is just the beginning, and that things happen for a reason. You'll be fine. Welcome to a wonderful calling!