Why not apply anyway, do the interview and bring your fiancé here for a few days. If she doesn't like it, don't come. Try though to at least speak with a few already here, some single, married, kids etc then, if you're offered the job, decide from there.
Despite what Talparc says, the vast majority of ex Ryanair guys and girls stay. You'll work hard but in a different way to loco short haul. Dubai isn't for everyone but it suits many. Huge variation in destinations and duration of flights with generally good bunch of people. There is a lot of negativity on these forums, some frustrations and advice of which is justified. However, the majority of pilots are generally content. Not super enthusiastic or highly motivated, but content. Get away from PPRune, enjoy a social life away from flying, embrace opportunities and activities unrelated to EK and you can have a good life.
It's all about what you make of it and your long term goals. 10 years is not an unrealistic time frame to start with. Good luck!
Harry