Help i am so scared. important?

Tell all your friends and the other people you met at the bar what is happening and ask them to keep and eye on him to see if he's watching you or doing anything to your drinks. Don't accept any drinks from him, and if needs be ask your friends to go and tell him that you are not interested in him and to leave you alone. Try and stay in large groups of people and avoid situations in which you would end up alone with him. Tell your parents about it, they can probably give you some good advice and its always good to tell as many people as possible about these things. But don't worry too much about it, just make sure he gets the message that you are not interested by telling him straight out.