Tell your boss he is sexually harrassing you. You do not need to go into details but it is your boss' responsibility to see that it stops. If he does not you can charge the store owners, the boss and the man for sexual harrassment.

Also, I suggest you call the police and tell them you are being stalked. There is probably nothing they will do but it will be on record that you told somebody.

Finally, what about your parents? They certainly will want to protect you and keep you safe. Does he have a wife? Tell her. She can sure make his life miserable. In fact, tell everyone you know. He will get the drift of what you are saying and realize it is not a good idea to keep after you.

This man is a looser at best and a danger at worst. Get him to leave you alone. You are too young to be worrying about an old man bothering you.