阅读下面的e-mail，根据e-mail的内容，给他写一封回信。与他交流你的看法，并帮助他排忧解难，80词左右。

Dear Mary, I am really sad these days because I have two problems. First, my cousin always borrows my things but never returns them in time. Second, I am under too much pressure. My mother is strict with me in my study but I can’t do well in English or math. What should I do? Yours, Unlucky