It sounds like we are in the same boat. Stewie is not my cuddly baby that he used to be, but he's still a blast to be around.
I'm pretty sure someone in your family must be sneaking him food. Either that, or someone mistakenly drops food and he eats it off the floor. That happens at my mom's house. My stepdad is always dropping things on the floor because he is diabetic and loses some feeling in his hands and is a little shakey w/ the fork and knife. It never fails that when we are eating, Stewie is under his chair watching like a hawk for anything dropped.
Stewie does the exact same thing where he makes it seem like he wants to get picked up, but instead he just runs away when you go to reach for him. He wants me to chase him all the time! Just refuse to chase him or ignore him when he gets very demanding. He'll learn that he'll get attention on your terms. Sounds like he's trying to test his stance at being alpha. I can totally relate.
Hang in there. He'll be better after he's neutered. Get your cuddle time when he's sleepy
