帮我翻译几个句子，很短的(中译英）

I love you so much,but I am sorry,I will disappear,but you must be happy!
你一定要开心快乐[You must be happy]

你好！
翻译如下 仅先参考
I love U.
Sorry anyway.
I am gonna go(leave).
Happy everyday.

你一定要开心快乐-- I wish you happiness every second.
谢谢

I love you so much.
But I'm sorry.
I will vanish from your eyes.
You should be happy ,be happy for ever!

I love you so much.
But I'm sorry.
I will disappear.
You shoud be happy!
You must be happy!

I love you.
But I am sorry.
I will die soon.
You must always be happy.

I'm so love you, but sorry. I have to depart(这里我觉得用启程、离开会更恰当点，disappear主要是指事物本身的消失，LZ你不会是真的要消失吧). Anyway I want you to be happy（但无论如何我都想你快乐）!