Need help finding the title of a Zombie movie

Rating: Null/10 (10 November 2005)

OK, there is this movie that i saw yrs ago when i was a kid on one of those movie channels HBO, TMC, CINAMAX etc and i can't seem to think of the name so i was wondering if someone could help me, it's a couple things i remember from the movie that may ring a bell.
OK here are the things i remember from the movie...
1. it's a guy in high school thats not popular..
2. he works at a funeral home
3. his best friend is a girl that is a cute but a tomb boy(and i think she likes him) and she works at the local gas station(mechanic)..
4. there is a high school bully that doesn't like him, but in some point of the movie the bully and his girl and a few friends get killed in a car crash i think maybe by zombies because they later turn into a zombies..
5. and what i remember about the end is the nerd guy and the girl killed the zombies but i think she ended up being one because she got bitten by one while trying to kill them of but didn't know it..
i know it's not much to work on but thats all i can remember & you never know lol, thanks in advance tho