He wants to break up, but, 1) he thinks the blow won't be so hard if he does it slowly, 2) He's a coward and wants you to do his dirty job or doesn't want to be seen as the bad guy, 3) He thinks the grass will be greener on the other side, but is keeping you in case his plans fail, 4) He means everything he said... Whatever his reasoning and true feeling are, the truth is you will hurt, I'm so sorry.