If he really wanted it, he'd come get it. If it was me, that's where my "thinking about it" would end. If my husband really wants something, he makes it happen. I can ask him 100 times to take the garbage out, but he won't do it until HE wants to, or until he can't stand the smell anymore! If I take the garbage out for him or I nag him, I get in the way of his responsibilities and become an external motivator... he never learns to do it himself.
By taking care of his stuff, and reminding him that it's there, you're being an external motivator. Stop doing that. He's an adult. Whether he wants to admit it or not, he's made a choice to leave the crap behind. Time for you to decide if you want that crap taking up your precious space.
I vote for selling his stuff or packing the stuff up and taking it to Goodwill. I believe they will come and pick up furniture that you are donating. That solves the problem of not being able to lift the dresser ;-)
:-) Shannon