Dear Chen Xin,
I know that you love snacks--I do too! You know that I'm always happy to share my snacks with you, or even lend you money to buy your own. But my parents have started to question me on where my money went--as you know, you often forget to return the money I lend to you. I'm not a very calculative person and don't want to keep track of how much you owe me, but my parents have been threatening to reduce my pocket money if I continue spending the way I am. I'm sorry, and hope you understand that I can't continue lending you more money to buy your own snacks. If that happens, my pocket money will be taken away too! Maybe we could just share instead? That way, we can both enjoy snacks but my parents won't be mad at me.
Sincerely,
Wang Ling