How do you get your ex-boyfriend back when we broke up three weeks ago cuz he said he wants to live the single life but says he still cares very much for you and says he isn't looking for anyone else?

At least he was honest. Many people like their freedom and want to do things in their life such as travel, a better education or heading for a good career choice. On the other hand he's selfish because he has no regard for your feelings, yet he wants all the fringe benefits without commitment. This young man needs to learn a hard lesson that YOU can't have it all, so kick him to the curb!