Was just going to say I think the birthday thing is a bit reading too much into it. Zoe might have called her for all we know.To be fair though, I never congratulate my friends through social media - I just call them or visit. I think Alfie/Zoe mentioned this before as well in a video or on twitter or something - that if they don't congratulate someone on social media it doesn't necessarily mean they aren't friends anymore.
My guess is that Zoe just didn't want to go to London or go to Tan's birthdayparty because she didn't know anyone there
Come on team Zoe, get rid of the loser please.