How will I know if he’s the right one to marry?

I’m a Christian woman. I’ve entered into an agreement that if I’m attracted to my best guy friend who’s been my long distance best friend for 6 years; when we meet in person in two months, I’ll agree to marry him in 2 years’ time. How will I know if he’s the right one when I meet him?

How will I know if he’s the right one to marry?
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