I'm studying business but I don't like it, I chose it the day before classes started.

At least there are lots of jobs for people with a degree in that, and I think that after some time I'll start liking it.
Besides, I'm still young, and when I finish this I can study other things I like more, so I might change my mind in some time. For example, I love journalism, but there are not many opportunities for journalists here. I'm planning to study that after I get my degree in business.
Try not to worry too much about this, if you realise that your choice wasn't good you can change to something different any time you want. Being undecided is normal, just relax and do what you feel.