Did I make the right choice in breaking up with my boyfriend?

Ok, I broke up with him in the first place because he was never motivated to try and find a job, he never took school (or anything in his life) really seriously, and he just never had the b*lls to stand up to his family and friends for me. I understand family and friends are important, but he also had his best friend b*tch me out for him, after I wrote him this letter saying I'd give him another chance if he cleaned up his act. Needless to say, I broke up with him last week, and now I kind of regret it. I know I could have tried a different approach, like prayer, but knowing how he is, I think I'm better off without him right now. The thing is, I'm pretty sure he cared a lot about me during the relationship, and if there was more I could have done to help him, I kind of regret leaving. Do you think I made the right choice, or should I have given him one more shot?