What?!? Date someone who is non-Orthodox? Why waste your time?
On the serious side...if you are serious about your Faith...then it truly is best to find a spouse who shares that Faith with you....better for the two of you and better for the kids.
This celebrating two Easters, two Christmases, fasting, not fasting, ..... it just opens up more possibilities for discord within the family unit.
I know....believe me I KNOW....it's hard to find an Orthodox spouse. Did I mention...I know?
However, watching those around me marry outside the Church....and watching all the issues they encounter....it's just not worth it.
Again, I know that marrying an Orthodox person does NOT guarantee familial bliss....however, it is one less reason over which to argue. We have our Traditions and traditions...and both seem odd to the non-believer. To me, my faith is priority one....and if my spouse, no matter how much I loved him, even hinted at ridiculing or belittling Orthodoxy, it would just kill me. I would be torn between the two.
I'm just saying....IF you can, try to find someone within Orthodoxy to settle down with.