此情可待成追忆，只是当时已惘然的英语翻译

What a memorable feeling!
But I was at a loss then!

when this love become a beautiful memory, what left with me is only a deep sorrow.

没办法，还是自己翻得好~~

This sentiment may treat recalls, but was already casting haze of confusion

This sentiment may treat recalls, was only at that time already frustrated