I agree with what's been said already. I'd also add that you should seriously consider talking to your clerkship coordinator about this for at least two reasons:
1) the intern has no right to treat you like this while you are a medical student and the clerkship coordinator may have ways of correcting this situation in a way that doesn't make it obvious that you are the one who blew the whistle (and even if this isn't possible, this behavior has to stop one way or another)
2) your evaluations are important for your clerkship grade and it builds a stronger case for dropping a bad eval (if he/she writes you a bad eval) if you bring it to the attention of the clerkship coordinator ahead of time that you are being treated unfairly and that the intern is being unprofessional/inappropriate
Ideally you should talk it over with the intern before you take the next step and talk to the clerkship coordinator, but it is up to you whether or not you think you'll get anywhere with that discussion. It is also entirely possible that you are completely misreading the intern and he/she could just be challenging you to test your zeal. I've also met people who seem hard on other people because that's their strange way of showing endearment. Bottom line is that the subjective means of our evaluations really makes us vulnerable to those who might abuse their power and we need to do everything we can to prevent scum bags from getting in the way of us achieving our goals (as powerless as we may feel in this fight...just keep fighting and do everything you can before it is too late).