Why is my Galaxy Nexus I9250 GSM not unlocking bootloade, not resetting nor flashing

[AC Question]

Hello, my Galaxy Nexus has a bootloop so when I reset it, it completes but after booting is show the password unlock screen and my picture in the background for about a second and reboots meaning not resetting was done and no data was lost. When I do "fastboot oem unlock" and goto to bootloader, it returns to lock. When I flash a new ROM, it completes but comes but to my password unlock screen and the picture in the background and the reboots. It seems as if it does not save anything it does.