What can I do to remove the bolt? The head straight up snapped off and I'm dying to get some suspension on my car

 

Use a press to take out the bushing and buy a new one. About the only option.

 

I had that happen to me but I was lucky enough to already have the trailing arm off the car. The bolt seized to the inside of the bushing sleeve and was too long to pull out. I ended up cutting through the sleeve and the bolt on the side opposite the head to get the arm off, then taking a blow-torch to the leftover end and using vice-grips to twist it out (hope that made sense...).

It was far from fun, you might be best off taking it somewhere and paying to have it removed. Take a lesson from this and use anti-seize when you put it back togeather.