Informal letter to my friends

Hi Emma.
I'm writing you this email because some friends had told me that you have neglected your studies. It sounds bad - perhaps  too bad, a bit! You definitely need to change some of your bad habits.
Firstly, I know that you are living in a big city and you have the opportunity to go to a lot of parties, but sometime you should say  'NO'. It's good that you pass time with your friends but not every day. If you do it, everything is going to be better.
Secondly, You have to study every day, you could try to study a couple hours and you could have the weekend free. If I were you, I'd study harder. You should think that you're able to pass all the subjects . I know that it can be difficult, but don't give up!
You are a lucky person because you can study what you want. Don't miss it!

I hope that's useful. Good luck. Hope to hear from you soon.
All the best

Anna