曾经,我以为我们心心相印,其实,你一点也不了解我翻译成英文是什么?

应该是，
Once, I think we to be affiliated, in fact, you do not know me

one time,i ever consider that we know each other,acctually you know nothing of me.

I almost considered that we were full in love once,actually,you dont understand me at all

I used to believe you are my soul mate, but actually you know nothing about me.

I used to think that we were soul mates, but the truth is that you don't know me after all.

I thought we had the same heart,in the end,you have no idea of me.