Hmmm, 3 years of seeing someone else and your still married???
Surely you must have to get divorced before you get married again!
I dont think you should get engaged until you sort out your other issues really.
It seems your morals are low priority, so i dont know why your asking peoples opinions really because your probably only gonna ignore any comments you dont really want to hear.
But, i am pretty old fashioned and like to do things properly.
many more will disagree with me...