I\\\'v been waiting for you so long

I\\\'v been waiting for you so long
I\\\'v been waiting for you so long

I\\\'v been waiting for you so long
i've been waiting for you for so long
我已经等你等那么久了

我等你很久了...

完成进行时强调动作的持续性
我一直再等你，等了很久。强调我没放弃过等你，有极强的感情色彩！