I agree, you've been pursuing him to get his things and he's put you off. A storage company would give me a set deadline and would sell or donate my things.
If you aren't being treated like anything but a storage facility, then I say it's okay to act like one and do the same. Send a note in writing, certified mail even to document you sent it. (It's not your problem if he ignores his mail to avoid creditors etc.) Then sell his things. What doesn't sell goes to charity.
You've been used long enough by this man don't you think? I have serious doubts a small claims court would argue you've not been fair. It's been since June at least that you've been housing his stuff.
Alice