Sentence 1: My friend Mark hooked up with me a few Years ago. 
 Sentence 3: I had seen Mark in 2013, but not since then 
 Sentence 4:  Tonight his wife contacted me on Facebook and said my email was bad 
 Sentence 5:  I sent Mark an email explaining I had switched email accounts 
 Option 1: I learned later that Mark blamed me for the breakup of his marriage. 
 Option 2: Mark and I were good high school friends, but lost contact.