How can she "like" you when the two of you have never, ever met?
It's not so hard.
I liked Set before I met him.
I'm pretty sure Diane liked dys before she met him.
There are quite a few people I initially met online that I liked well before I met them in person.
Of course, it was sometimes literally months and years of conversations before I felt I knew a person to say I liked them ... but I still think it's possible.
I think meeting LiontamerX is still my favourite example of knowing and liking someone before meeting them. I'd never even seen a photo of him but when I saw him on a street in New York - admittedly in a group of people near where we were to meet - I 100% knew it was him. The two friends I was with (one was Noddy so she 'knew' him from A2k as well ) kept asking me how I knew - I couldn't explain it.