Most Helpful Guy
I think the sooner you tell him the better. Especially if the seizures are frequent. He needs to know what to expect and how to deal with it if you have one. Because if he doesn't know and you have a seizure. It will scare the hell out of him.
Most Helpful Girl
there is no easy way around it sorry, your just gonna have to go for it. good luck I'm sure it'll be fine :)