On the Bright Side, I'm Now the Girlfriend of a Sex God — Louise Rennison

I think I have snog withdrawal.

Georgia Nicolson is dating the Sex God so life should be perfect ... except in Georgia's life, nothing is ever perfect. Her cat, Angus, is terrorizing the neighborhood. Her sister, Libby (who is slightly mac), hides her pooey knickers at the bottom of Georgia's bed. Then the Sex God breaks it off because she's too young. It's time for Georgia to become a heartless boy magnet.