I completely agree with anna here. It sounds like you might be treating him differently since finding out too. If he doesn't think it's a big deal, then it's not. ...Especially if he has only had 2 seizures in the past 2 years. He doesn't sound like he needs help.
However, if he's interested in having surgery (and I do mean if he is interested, because it's his decision and his life) then I may be able to help. I had the surgery 5 1/2 years ago in new york, at an excellent epilepsy center, with an excellent surgeon. I don't think they want advertisements on this forum, but if you want more details you can send me a personal message. They had to be cautious with me so I didn't lose too much vision, but even so my seizures are much better now. I still take 3 meds, and I still have simple partial seizures all the time, but they never ever generalize or even turn into complex partials. I can go to school and even work again. There has been a dramatic improvement in my life.
Just keep in mind that surgery is a big deal and it should only be considered if the epilepsy is really interfering in a person's life. Also, not everyone is lucky enough to be a candidate, so a lot of pre-surgical evaluation is necessary. And remember, it's your fiance's decision (not yours). Just support whatever he decides. Good luck.