Why not? I think that's sweet.
I prefer the term "partner"
Simply because I don't like "girlfriend" and "boyfriend". I don't really know why. I guess because they sound immature.
Even though we aren't legally married, my man calls me his wife or "my missus"! I call him my "husband" or "partner"
I think its significant other now rather than boyfriend girlfriend
YES, why wouldn't it be? Nothing changes except age and maturity.
Manfriend and Womanfriend are more appropriate for those in a civil partnership.