oink - Mind me asking... are you one of these 'straight A' students (OR near enough), with a history of head in books, mostly studying, so have much less spare time for socialising?
I'm generalising - sorry, but I've come across a couple of HK teens like this who are over in the UK and not having the uni life they had hoped for... (They email me from time to time about the rather 'strange' stuff happening 'round them )
I think personality and temperament, adaptability, resilience, interests, along with upbringing, counts a lot...