Relationships happen randomly in Tomodachi Life, and sometimes they will work out and sometimes they won't.
You can TT but it punishes you for doing so, if you TT via the game's in-game clock you won't be able to get most of the new items in stock for a full day.
If you TT via the 3DS clock, you won't be able to get those new items for 4 days.
Nintendo probably knew that people were going to do this.