friends with Ex?

Hailey
Can one be friends again with an Ex that they still are in love with ? 
My ex is basically tourching me by saying we need to be friends again to astablish trust and regain our relationship which makes no real sense to me at all and seems as if it's in Human to do agree ?  
My life's been crashing since he's been gone and now I have an the option to keep him in it but this shall be hard for me any advice.  ???
#HELP