Allah knows what's better for us whether its losing your friend, girlfriend or family. In the end you'll be questioned about what you did in this world no one else matters. Everyone will die, death via heart attack or cancer is just a reason. Jis ka likha ha usny jana ha no matter what.
There is no way that this would happen and even if it does then i will surely leave her because nothing is more important than parents, what they sacrificed for us and for our happiness.