I Am Tired of Creepy Guys Hitting On Me

I had a roommate like this. Fortunately he was kicked out. But he and his wife, yes wife, lived downstairs. He'd come up and try to get me in long conversations and flirt with me for some reason. Once I was getting ready to meet a friend and he stood in my doorway smiling looking me up and down amazed. Not long after that we're watching tv and his wife mentions he named their all black cat Nigger. That pissed me off and had me even more disgusted about him hitting on me.