Most Helpful Guys
He saw greener grass. Broke up to clear the decks and it didn't work or didn't happen. He gave up a sure if only adequate thing and lost and now wants to take it back. If you take him back he will eventually do it again. He has already shown you who he is-believe him that first time
Just because you want to leave someone, and made the decision to leave doesn't make it any easier, believe me!
Some people may not find it hard, but it's unfortunately perfectly possible to have to leave someone who you still love, and that feels like the hardest thing you've ever done at the time.
Most Helpful Girls
A couple of things I can think of, maybe to him the break up was necessary for other reasons besides not loving you anymore. But of you love someone who isn't right for you, it might take some time to get over.
As for me, if I break up with you I get over it instantly because I never dump people I actually cared about, they must have been doing some messed up things for me to end it, so instead I'll be relieved.
Because he still cares about you , you 2 made memories while you were together, and memories aren’t easily forgotten