I totally understand your position with family. You have every right to say "no thanks" or "not this time". Some families don't make a big deal of it, mine did.
It's tough to make the changes you will need to make concerning your family. You're right, it needs to be done in good manner. Good luck! I'm sure you and your C will work this out.
When you can't make a decision because you are torn between your heart and your head, listen to the half with the brain.