Walking Among Them

Asher Grimes was the heartthrob golden boy with the loving mom and cop dad, until his dad was shot and he was thrusted into a world where the dead started walking around and eating people, and a mom who would rather comfort herself in the arms of his dad's best friend then make sure her children are happy.

(Lori will be much worse in this book because I didn't like her in the show. Some people who would have died won't and some people who didn't will. Asher is pansexual and has no set love interest at the moment so it could be anyone you want it to be.)