how come m gonna prove my self at interview if i happend to go alone. kindly some body explain it.appreciated
the intention of the interview is for OP to meet you TOGETHER, see you, accept your joint proof of married bonefide and make a decision upon your evidence and your both behaviour (if you act like strangers he wont deny, he will just put notes in the case so that 3rd party agencies can check you more accurate, vs, couple that looks very eligible to be a real married will get higher score so less checks will be made and case moves faster).
I think I dont really understand your question - you want to show up on the interview that will determine what was written above and explain that: you guys are not together, that it is not a real 100% married couple when two people love and care for eachother --- and after that you expect the OP to say: ok, welcome to the USA, here is your green card.
on what condition??
the OP should say: ok, sir, while you both were together bonefide you have been living in the USA and use most of our country benefits (ss system, you worked, being a part of society, use our road, etc, etc), now looks like you not a real couple together anymore so it should be obvious that your existing benefits should be withdraw.
It is obvious to me and just by explaining: oh before we were together happy so give me my green card today - does not really make much of a sense.