Re: An inch away!
Zalim, 5 years of friendship are precious, very precious, no matter what gender your friend is of.
As your friend happens to be of the opposite sex it might be tempting sometimes to wonder if there is more than friendship...please think very seriously before moving on and talking about your (supposed) feelings with her as it could destroy all the faith she has in you as a FRIEND, no more.
I know what I am talking about as my best friend is a male (we have known each other for 7 years), and the basement of our reliationship is a "no physical attraction" rule system we elaborated during these years as we became adults...
Considering you are already maried, as long as Islam allow men to have up to 4 wives, if your wife doesn't mind and IF this friend loves you actually, then you could marry her....but look there was two "if" in that sentence....so you have to think deeeeeeply Zalim Wadera.
hope this will help you.