It can be treated. Drugs can help to an extent. A better solution may be therapy which can try to reprogram the thought processes so you can deal with those thoughts when they come.
Most of the time I fly, I don't even think about it going wrong. When I do, I just remind myself of the statistics. If there is turbulence or something doesn't feel right, I watch the air-hostesses. They do it everyday so know whats normal. If they look calm, I'm happy. If they started to panic, I would to but that hasn't happened to me.
Otherwise, France is beautiful and you don't need a plane. There are quite a few countries in Europe that you could reach for a holiday without flying.