I'm not sure, I would love to see what other PTer's say.

To me, it sounds like this is little guy who was 'dumped" and didn't know WHAT to do. You stepped in and rescued him and he is afraid of being left again. So this should settle down over time. Some things which may help - set up a place for him and put in an old sweatshirt with you scent on it, or a towel with your scent. Does he enjoy sleeping on your bed? That is where your scent is the strongest and often where pets sleep when the owner is unavailable. No saying how long he was on his own, but he may have been taken away from his mom before he was ready, so again he needs time to heal and adjust to that. Give him lots of loving and petting and then set him down on the spot you set up for him with your scent. Of course, being so young he doesn't stay in one spot more than a moment!