Hahah, it's crazy that you'd post that- my own aunt is named
Constance, and is called
Connie by everyone, even though she abbhors it and insists everyone call her
Constance. It's certainly an inevitable nickname at some point, though I do know a teenage
Constance who has managed to make it very clear that she is NOT "
Connie."
Maybe you could use it as a middle name?