how do i divorce my wife that i have no contact with?

This fairly common situation is pretty simple to solve.  Any lawyer will have a process server company that can perform a skip trace and either find the person or do an affidavit of due diligence indicating that the person cannot be found, which then permits service by publication. Depending on facts you do not recite, there could be a lot more to this -- was any property, or debt, accrued by either party during marriage, despite separation?  If so, it should be specifically addressed to avoid the nasty surprise of someone showing up many years later claiming half of whatever accrued during the past 13 years.  Any kids?  They also need to be specifically addressed.  You should consult with a family law specialist well familiar with the Forrest decision and its meaning.