Getting on my nerves

I have a phobia to work for the past few weeks. It's not because of the content of my work but the journey to work that make me feel this way. I'd seen that same guy who appears at the same place as I am, and the problem is, he keeps staring at me like nobody's business. That's really irritating and annoying. From the station I took my train till the place I take bus exchange to my workplace, he's there. I'm not paranoid and I'm really scared at times when he doesn't seem to be afraid when I stared back at him. He gave me that smirky smile. I'm prepared to file a police report when I have enough evidence on hand though I'm not quite sure if the police is going to do anything about it. He's getting on my nerves.