gas line is frozen, cant move car to warm place..

my gas line froze, i only had half a tank when it froze. i added gasline antifreeze, but i know that wont thaw it, just prevent it from happening again. the car is too low to get a heater under there, and i cant move it to a garage or anywhere warm. is there any other way to get it started? also, the battery keeps dying when i crank it too many times. its plugged in and weve boosted it twice.