(Don't Be) Gone Long (слэш)

Their fifth morning in the cottage, Martin wakes up and Jon isn’t there. The blankets beside him are still rumpled into a vaguely Jon-shaped arrangement, but the space is cool, as if he’s been gone for some time. He isn’t in the bathroom, or the living room, or the kitchen, or right on the front step when Martin hopefully walks outside. He is, it appears, nowhere in the vicinity of the cottage. 
Martin shoves away the pang of cold anxiety that echoes in his chest. 
*
Martin's left the Lonely. It hasn't entirely left him yet, but it's getting better.