Meet Joe Slack

My boyfriend does everything halfway, save for playing video games and smoking weed. He does sloppy work at his job, just the minimum to get by, and is always late turning things in. He's gotten away with this so far, maybe because he's charismatic and fun. In our relationship, he'll promise me one thing and do another, and he does sneaky-lazy things like using up my shampoo but leaving the empty bottle in the shower. He's highly intelligent and could be so much better than this. Is there a way ...