Oh no, don't get back with an ex, that's never good. I can guaratee you two are just going to break up again. Just stay friends. Especially if he said he broke up with you merely because 'you didn't make him work hard enough to keep you.' Come on. He's playing games with you, so don't jump through hoops for him when he gave you that lame reason on why he broke up with you. If he really still liked you, and didn't just want some girl to mess with for a while, he wouldn't have broke up with you in the first place.

hahaha. okay dumb reason to break up but still, if you break up you break up for a reason. find someone better. who knows how to work for what youve got.

Well I agree with two previous answers, but since it is your choice, and your questions wasn't whether you should go back to him or not. I would say the best way would be to have plans, other than with him. To make him work hard for you, you have to seem independent, therefore first of all you NeeD to make yourself feel as if you don't need him, he is an icing on the cake, but you could go on without him. You don't have to fully avoid him, you can even invite him, preferably not one on one, but to a place where you could put your attention to other people as well, MostLy other people. Now be careful, do not turn into a slutty walk around, don't obviously flirt with guys, or concentrate on making him jealous, be yourself, float easy. Feel like you are in a social river and you are simply floating with the flow, and that flow is NoT leading you to your Ex. Don't ignore him completely either, come from time to time smile, and say: Are you enjoying yourself?...whether the answer is yes or no, be sincere but distant. Ex: if he says no, you softly but unapologetically look into his eyes and say: I am sorry I wish I could do something about it. Then smile and walk away. If he doesn't let you walk away, like he says they are things you could do, say anything for you but right after I go ...to a bathroom...get a drink...go dance...wtv, just make sure after that go do your business, and don't come to him. At the end of the party you could always bring him a drink and say hopefully this will make it better and disappear again. Well you get the point, be a tease. When it comes to sex, resist. Let yourself kiss him, hug him, but when it really come close to it, say I would love to, just not today, hopefully I will see you tomorrow. Do not give him a call tomorrow. If he doesn't call it's cool. The next day you could send a short text, or a msn message, saying Hey, missed ya. Hope you having fun. After that let it simmer. It is all about being independent, distant, and about calculating time, and having patience. If you do have sex, act casual about it next day. As if it wasn't a big deal, and do not give him compliments, if he asks say it was ok, with a cunning smile. Good Luck!!!