Ok my yahoo answers family....should I tell him?

I have not been involved with a male in years. So I met a guy who I have been solely platonic with for about some years now. He helps me out alot. I do not want a relationship with him but lately I've been thinking about him. We talk everyday about nothing (Seinfeld). But one day while I was masturbating I thought of him so I stopped calling him and pulled away. I noticed before this I got jealous when he was telling me about him and his girl.So now he ask what's going on. I don't want him but...... should I tell him?