What can be inferred about Boo Radley when Dill remarks, "Maybe he doesn't have anywhere to run off to..."?

We can infer that Boo, like Dill, can't leave because he has nowhere to go, and no one to care about him.

The question is why wouldn't boo have anywhere to run off?that's because boo's been keeping his self locked away for so long that no one cares about him any more and he has no where else to go.