hopefully you are going to ignore him now - can't you put him in on your junk mail list so these messages don't go in you inbox? whatever you do don't reply to him anymore.

my ex did a similar thing to me. he left me, i took him back, he left me again, said he hoped we could be friends and didn't contact me for five months. then he emails me via facebook me to say he is living up the road and would like to be friends, but wants to take things slowly. i emailed him to say i wanted a clean break. THE NEXT DAY he loaded up on facebook that he is in a relationship with someone else. funny he didn't mention that when he emailed me...so clearly he was looking to hedge his bets. he won't be emailing me again though because i have blocked him. some people are simply a lost cause.