Its not the same on line Cally. You need to spend lots of time with her, person to person, before you make any major decisions. Have you been to NZ to spend lots of time with her in her home country? Met her family and friends? Seen how she interacts with them? Been to her church?
At the moment its just like a holiday not real life. 3 weeks of being together is so very short, far too soon to be planning a wedding.
Then pray tell me, how marriages work in the scriptures. Judy, she will be leaving her family to be with her husband, WHO cares about her friends in NZ. Also, a woman leaves her family to be JOIN to her husband for life, so why be overly concern about even her own family? Jacob's wives LEFT their family BEHIND, and were joined to Jacob. THAT's THE WAY it works based on God's word. When my daughters left to be joined to their husbands, my life with them CHANGED forever. Oh, I see them two to three times a year, but not much more than that~they have their life, with their husbands and children and I do not interfere with it in the least. We talk about three times a month, but not much more than that.
One more thought: There is no such thing as perfect or near perfect compatibility~each spouse must be ruled by God's word to make a marriage as perfect as it can be under heaven. If she is subjected to God's word first and foremost, then THAT'S the most important test~of course attraction must be consider~if each is attracted toward each other, then that's a BIG plus and I would consider an important thing in a spouse.
My son did not leave but lives very close to us, not so with the girls. Their husbands took them with them~that's just the way it should be.