omg. you need a hug. so, two directions to go on where you're living (three is you can leave town). But instead of WAITING for mom to find out, why not be proactive and tell her what's happening, with you, with your job, with your son? Do you have somebody to talk this over with? Do you want to leave her behind once and for all? Why not see what's happening with sibling and move 2 hours away with them? Oh, my "two choices" were, 1) get a roommate or 2) wait for son to have to move back in with you, but now with his gf.