The problem was that Joanie probably meant it and could pull it off. He didn't want to fight her or push her away - if he wanted to, he could probably force her out of his apartment and lock her out. He would just like to be able to leave his apartment again without Joanie fussing over him heading towards a bridge. He'd told her wouldn't do it again, wasn't that enough?
Luther rolled his eyes, moving back to the kitchen to get his glass of water. "While you and Hannah were here, I could have gone into my room and climbed out the fire escape. I could have jumped from there or hung myself off of the railing. I could have gone into the shower with a toaster and electrocute myself. I could over dose on the pills in the bathroom. I could take a knife from this drawer, right here and stab myself and neither of you would have been able to stop me." He raised his glass, taking a sip with a grimace. "I would have done it by now if I could have."
He paused, realizing he listed off too many options. Wincing he added, "And I wasn't thinking about it either. I've looked into enough suicides on my job to know all the options."