You can get out of this it shouldn't be too hard.
First get the phone off so you can boot into recovery. Once off turn back on while holding volume down, once that boots you should be in hboot, let it scan the SD and it should not find anything then you can press volume down to highlight "Recovery" then press the power button to select it.
Now if you made a backup you can go to backup and restore and restore your backup. If you didn't you need to wipe the phone and try to reinstall liquid (just to check to see if it is a bad download)
Assuming you didn't make a backup you need to use the volume keys to navitgate to wipe data/factory reset and press the home soft key, choose yes and let it wipe. Next wipe cache the same way. Now go to advanced and wipe dalvik cache. Finally go to mounts and storage and wipe /system.
Next you will need to choose apply update from SD then choose zip from SD, then navigate to the /clockwork/ folder and somewhere in there you will find the zip for liquid (yes it will take some digging, use the back soft key to go up a directory while searching) once you find it flash it and reboot.
Hopefully it will flash and be okay otherwise you will need to download another rom zip and flash it, you would need another phone or computer to put the SD card in.