Is it OK for 17 to date 23?

The law does not punish non-sexual relationships between adults and minors. There is nothing legally wrong with a 17 year old dating a 25 year old in any state when sexual contact is absent.

Is it bad for a 17 to date 25?

A 17 year old can be mature for their age, and a 25 year old could be less mature for their age, and two people can be compatible with each other or not be compatible with each other.