don't wait for the storm to pass, learn how to dance under the rain

hi, posting a topic like this is very weird to me, as I never thought something like this would ever happen to me, I have two "stalkers"

one is in my school. it started as an inocent game. he started saying compliments to me and I had a good reaction at them, I never thought someone would ever give  me a compliment, and that is why I was a 100% sure he's just fooling around. but then he started screaming my name once in a while whenever I walked by, and making comments to me, and he walks near my classroom and looks trought the window of the door, and sat next to me in a school meeting, and other stuff like that. I used to be sure he was just joking, but now I'm not that sure. he has a reputation in my school of not being so nice, something jerkish, but in a school trip I was able to see he isn't that much of a jerk, but the camp ended and now he's the old him, wo doesn't really talk, if he talked to me like in a real conversation, I'd like him a lot more.

the other one is the worse type of stalker and really creepy: an internet stalker. he added me at msn some years ago, and I talked to him as I didn't have that much of a social life. but then he started talking about wanting to meet me, I always changed the subject, until one day he went to my country, I felt like diyng. he told me about meeting him but I never answwered or set a day. so he retuned to his country, and today I got into my msn and he started talking to me, and he remembered where I was from (which I actually lied so to aboid things like this) he told me that I didn't wanted to talk to him and that I was afraid, I never answered back, then he logged out and I'm scared, I fear what he might do, I am really afraid that if I tell him that I don't want to meet him what he might do. I'm scared. I don't want to tell my parents, should I stop admiting him?? what shall I do??