Mickey used to be like that. Now, after only a few eeks, I'm comfortable with letting him out without a leash and on his own. (with someone with him of course)

All we did was act a bit stricter when we told him to come. Before we'd be more laid-back, it's like he felt like he had the choice whether to come or not. Now, we say it in a stronger tone and he knows he HAS to come. Maybe you can work on your tone...?