Maybe YOU're the one staring? searching? wondering eyes...
I've notice this a lot.. people who are paranoid actually "search" around to see who is looking at them, and when you're looking around people tend to look at you so when you meet their eye, to the paranoid person it comes off as "that person is staring at me", when in reality they only met your eye because you had wondering eyes to begin with... and the cycle goes on... your eyes keep searching for someone that's looking at you until you meet another pair of eyes and WHOOPS, there they are again looking at you!
so RELAX! stop looking around to see who's looking and being so paranoid.
If you're actually attractive you'll attract people without having the need to be looking out for who's looking at you... and if that's the case and you still don't like eyes on you then it's so easy to dress down and don't do anything special to your hair that makes you look pretty and such... I doubt you're the most gorgeous girl in the world. :]!
You're a young, attractive woman and men are commonly lacking is the basic social graces. Many even drool and make gurgling sounds in addition to staring. Though if you find it happening more than once or twice a week, you might be perched precariously on the cusp of a paranoia meltdown.
You look like a nice looking guy...maybe they are staring at how good you look...I have people, guys, girls, and even animals and kids, who stare at me all the time. Not because I am different, but because I really am good looking, and have been told so millions of times in my life. You shouldn't be "paranoid", you should be proud.