If someone can't or won't respond, we call them unresponsive. Depending on the context, a person's unresponsiveness can be just a bummer or a life-threatening condition.
Take this word piece by piece. Un- means "not," as usual. A response is a reaction to something. And -ive is a suffix that means "state of being." Taken together, these parts add up to "the state of being not responsive." When your boyfriend just sits and stares rather than talking about what's bothering him, he's being unresponsive. Medically speaking, when a person is called unresponsive, it means they're at least unconscious, and possibly dead or dying.
adj not responding to some influence or stimulus
temporarily unresponsive or not fully responsive to nervous or sexual stimuli
not responsive to physical stimuli
deficient in human sensibility; not mentally or morally sensitive