When I first started I had a very clingy, needy client. He actually wasn't very demanding physically, but he became extremely emotional during the appointments as well as leaving voicemails when I couldn't answer the phone. I saw him at my starting rate even after I upped my fees significantly. He would over stay a lot, and it came to the point where I couldn't take it any more. I had my own problems and with him staring into my eyes, contorting his features with "love" for me I just broke down and cried in front of him. Later when I sorted out my own life I phoned him and told him it was too much and I couldn't see him anymore. I was really scared of his reaction - but in fact he just said "ok whatever you say babe".
About 6 months later he called me and surprisingly told me he had realised how stupid he had been, and had forgotten it was all just about sex really. I agreed to see him again although told him my rates had increased slightly. I still gave him a discount and he behaved implicitly. He was too scared to have to miss seeing me again.
So, I would say - tell him he's too overbearing and see what the reaction is.