These boys are pressuring me and it is making me really insecure?

I'm 16, I have blonde hair and blue eyes, and i'm at boarding school. I used to be more shy but i have slowly gained confidence in myself throughout the year. Very recently, a lot of guys have been approaching me and talking to me, telling me that i am 'really cute' or whatever (please don't think i am trying to sound conceited i am just saying what they have told me) and have been asking me to hang out alone in their rooms. I'm not a prude or anything but for some reason the pressure that these guys are putting on me is making me really insecure and is making me lose the self confidence i have gained slowly but surely. Why is this happening and why are they approaching me now? In the beginning no one even looked at me and it made me feel as though i would never be noticed, but now i am getting some kind of attention. Why is this going on and how can i stop being insecure from this!??! Please help! Thank you so much.