won't be for the rest of your life lah... it will only be for
the next 2 years of your life 
hmm... maybe u should do a deeper evaluation of what u like and
dislike about each subject to gain a better understanding of which
area u'll like to further ur studies in? for example, what do u
like and dislike about science - maybe u like finding out about how
things work, u enjoy experiments, u hate the detail, etc etc... for
humans maybe u like the analytical part, dislike the readings,
etc.... draw up a pros and cons thing for each and do a
comparison.... hope u can understand urself better through this
process! 
choosing what u want to study and what u want to work as is not so
much about what u are good in.... it's more about what u are
interested in
