Just be firm and assertive. From your description, he actually doesn't seem so much creepy-stalky as he is just flirting. But like Emmers said, you have a right to say no.
Remember, you can still be polite or nice and honest.
But there is a difference between flirty and being a creeper! If he won't leave you alone or is following you after you've made your point, it's time to give a firm "You need to stop." or, get help.
Last edited by AshofRebirth : 01-03-2013 at 08:17 PM.