I would be devastated if my mom died. She's the one person who I know will love me no matter what and the thought of losing her is enough of a downer to ruin my whole day
When I moved away for college, I missed her so much that I barely ate and slept the first week and called her everyday.
The scariest thing about this, is that once she's gone I probably wouldn't have any close family left, and I may end up alone for the rest of my life.