So happy because just for you all along is you

So happy because just for you all along is you
So happy because just for you all along is you

So happy because just for you all along is you
首先,这句话不完整.
其次,一定要翻译的话我认为是：如此开心只是因为你一直在做自己.

如此开心，因为只为你自始至终是你的

So happy 如此开心的歌名
just for you 只为你的歌名

（我是）如此高兴只是因为你一直在做自己。
PS：括号里的是根据语境加的