I'm 22 years old and I was diagnosed a year ago, but now I've totally learnt how to live with my condition. I don't cry over burgers and never had the temptation to eat something that would make my body attack itself (like burgers).
I won't feel bad if I pass this on, because I've coped with it so well. I'm sure my children will have no trouble coping with it, either. As said, this isn't the worst thing you can pass on.
But people are different. Maybe you start considering suicide when you scratch your car or twist your ankle, whereas I just deal with such things. I think you and your son should pull yourselves together.
Celiac disease isn't the biggest problem here, I believe it's more about attitude and your aspect on life and how you deal with problems and on times when things don't go your way.
I don't think you should feel guilt for a moment for passing on the disease. Remember that you're the reason your children exist!