No way u really are with a dodgy person I would move away from that person, to keep yourself safe. Don't u no how to be safe when you're out? Do you even know that guy? If not don't approach him in any way and yes it could be likely you are being used. Dodgy people mean horrible things will happen if you are not careful. Don't hang around with people you don't know especially when they are dodgy and that could lead you in danger and possibly of they cause lots of trouble thay could get the police involved, it could lead you into bring in trouble too, just stay out of it. The best thing I can suggest is to move right away from that person. Go to a friend or someone you trust and supports you, and tell them about the situation with this person. In the meantime keep yourself safe, I would find another relationship someone you trust and get along with. Make sure you don't approach anyone dodgy. Take my advice, please stay safe.