我想我已经忘了你,谢谢曾经你给的美好?

I suppose I have forgotten you. Thank you for the beautiful times you have brought me!

I've already got you out of my mind
thank you for the good old days you've given to me

我想我已经忘了你,谢谢曾经你给的美好?
I think I have forgotten you, thank you for what you have done for me.