Hi Lala,
Have you or your parents actually been to Dubai yet? If you haven't perhaps you should come with them to check it out, I assure you that will be enough to change your mind.
I agree with the others, I think Dubai is a terrible choice for a lone teenager. I think that if I was your age and had the chance to experience life abroad I would go for a western, non muslim country, where I can have normal, "teenager" fun, and where I could actually learn a new language (here everybody speaks english so you probably won't learn much arabic, in case you were wondering). I would also go somewhere with better weather, and where it's easier to get into nightclubs and just do normal teenager stuff without having to worry to end up in jail because you did something rather stupid and innocent but offending to the local sensibilities and laws. Me and my boyfriend got told off for kissing in a major tourist hotel so I assure you that Dubai is no Miami (in case you haven't been to Dubai yet, which I suspect you haven't, otherwise I don't think you would have thought about going there on your own). You won't be able to wear stuff that regular teenagers wear everywhere else, like a miniskirt and a tube top, for example, unless you want to be stared at or even told off. You won't be able to get into clubs, nor drink alcohol. You won't get a drivers license. You'll basically have a horrible time if you ask me. And I don't think you will find boys of you age to go out with either

Your life will basically suck

Try Brazil. Or Spain. Or my Mexico

You'll learn a new language too!
Izzy