This guy is scaring me what do i do?

Ok im 17 and ive known him about a month but he came on way too strong about 3 days after i met him. Everyone ive asked about him have said he is wierd and creepy and to be honest hes always given me the creeps and thats hard to do. He likes me apparently and i dont like him and ive tried everyway possible to nicely get that through to him (including telling him flat out that he just isnt my type and i dont see us as anymore than friends). So that was a week ago and i didnt see him for 3 days. But now hes following me, i saw his car in the rearview mirror of mine once and i always see him at school (its a big school) he texts me all the time and he calls me everyday and i never answer. Last night he went too far he waited for me to get off of work and as i was getting in my car he came up and started talking to me and he stood way to close to me and he actually tried to kiss me but pushed him off and started getting in my car. im small 5'3 115 lbs and hes 6'3. my best friend is a guy and ive been staying by his side and hes had to intervene with the guy a few times and tell him to back off. what do i do?!