What can i do to get rid of men that supposedly like me?

okay, there are four guys that say they "love me" they all have proposed to me, more than once. one has became my stalker, and he calls more than 100 times a day. the other is a guy is a total pervert and doesnt understand that isnt the kind of guy i want. the other is more of a boy than a man, and hes just not what i am looking for. the fourth... is a sadistic morbid boy that talks about biting, beating, tying up...and sometimes scares me. I have tried to be honest with these guys trying to get rid of them but everytime, they just come back, i have tried being rude, i have yelled at them, and even pretended to be with another man...but none of thing are working help me please?