You know, Alex's mind was pretty fucked up when she first got to London, even after the shop, wanting to be friends with Sebastian might not have been just so she could have company. Think about it for a second.

Tall, pale, kinda sassy, mature but for sure has his childish side, very good at hugs and cuddles.

Sound like anyone else?

Perhaps her other friend, Dika?

Don't get me wrong, Alex wasn't trying to replace Dika.

...

It was her way of getting a best friend that just reminded her even a little of how happy she was before everything happened. Something she wanted/needed to cling to...