Unfortunately, from the factory, the plug wires are not installed with "anti-seize" inside them. I find twisting them first, left and right, and then pushing down and twisting again helps. Also, make sure you are grabbing by the boot, and not the wire. Again, unfortunately, sometimes breaking a plug wire is inevitable and is a common by-product of removing these wires. Good news is- the aftermarket wires will come with a little tube of anti-seize, and you will never have this problem again.
What about using a spark plug boot puller ($5 at harbor frieght) ? These boots are really long and made out of foam. The boot puller looks too short. Is there another tool that will work ?
Should I just buy a set of wires too ? Incase I have to break a wire ?
If you can get a tool that has a long, skinny enough reach- absolutely! I have a set of LONG needle nose, that i have bent the tips into half-circles. It does help a little. Make sure you still do the "twist" method. And the boots aren't really "foam" they're rubber and can take more a beating then you're giving them credit (within cheap OEM part specs that is). Just to be safe, grab a set of wires, and keep them in the box with the receipt. If you don't need them, return them.