There arent any laws around being in a non-sexual relationship where one person is under 18 and the other over. Once you turn 16 its not illegal for someone to have sex with you no matter how old they are.

Can you date a 14-year-old if your 18?

If you are 18 and she is 14, you could be arrested and charged with serious sex crimes, even if you dont actually have sex. Even kissing a 14-year-old can be charged as a felony in California. Thats the kind of crime that can stick with you for life.