Your sweet lies deceive me.
Your sweet lies, make me smile every time I see you.
Your sweet lies, make me look at you differently.
Your sweet lies, make me the happiest.
Your sweet lies, make me believe you.
Your sweet lies. make me feel normal.
Your sweet lies, make me forget the truth.
Your sweet lies, made me fall for you.
Heavily inspired by: Exo - Sweet Lies, Jonghyun - Let Me Out and Jonghyun's farewell letter
You did well Jonghyun, you worked so hard.
I'll try to kind of interpret his letter and to explain the emotions, with the goal to make people understand what it can feel like, why somebody would do this and why you should never just ignore it, but act immediately.
If you or somebody you know is going through something similar, please search help, it will get worse as time passes. Time doesn't heal everything, effort sometimes does.