I scanned Rooney into my current NL town via Amiibo back in the beginning of January. He was the one to give me a Valentine’s Day card with a chocolate heart for Valentine’s Day a few days ago. ^^
I don’t know what gender you are or what gender you play as, but in AC:GC, AC:CF, and in AC:NL (and WW doesn’t have Valentine’s Day), you can only get Valentine’s Day cards from villagers of the opposite gender. so if you play as a female, that’s the main reason why you didn’t get a Valentine’s Day card from her. If you play as a male, you might be closer to another female villager.
As for birthdays, I’m not so sure, though I don’t know why Nintendo would make it to where they can’t hist birthday parties, so again, you might just be closer with another villager.
My birthday is coming up in June. I’m very curious to find out how it will go down in the Animal Crossing games this year, especially after reading this. If I can find this topic in four months from now on June 9th, I’ll definitely be sharing about my experience in New Leaf this year. ^-^
I feel like Rooney is who I’m closest to, so it will probably be him, unless Amiibo villagers are somehow excluded from being the birthday host.