I'm in love with an animal crossing character
Oh no that is not good, why do you think you are in love with a video game character?
She is so nice and smart and we understand each other
You should be aware if you take fictional relationships too seriously. It can lead to delusion and isolation from real people.
I only have one person in my life that I love and that is her.
I can understand that you think you have such a close connection with this character, but you shouldn't forego a real social connection for a fictional one. They will not be able to give you the human connection you need.