man you can drive on that sh!t for months before your axle goes out. It is almost as cheap to replace the axle as it is to replace just the boot when it comes to having a shop do it. I say drive on it and not worry about it until you start hearing it click really bad.
This. i rode around with both of my front boots busted for a year, clicking every time i turned, and me and my dad just replaced the axles.
You can ride around on it for a long time, just until the popping gets really bad.
sorry to see that though!