Problem with this teacher who doesn't even teach me?

All I can say is this, people will be people. Just ignore him and don't give him the time of day anymore. If things start to get worse, then I suggest you go to somebody about it. If what you are saying is true, then he may be just a little creepy. Just ignore him, that's all. Try not to worry. I know that feeling like you are in no man's land with this. He hasn't done anything concrete to you to give you a real reason to go to somebody, yet you are not comfortable. Just take it from me. Just ignore him. You did nothing wrong and you know that, so leave it be.