AITA: Am I the only one weirded out?

I (17F) had a hickey on valentines day (which I covered with a bandaid on my neck) and this dean (60M) (who crashed out on me before for sitting in the hallway and who I repeatedly ignore) says hi to me and i say huh and he says something else and i say huh and then he looks at my hickey frowns and says happy valentines which prompts me to say huh for the third time but then he asks me arent u going to give me candy so i just ask him why would i give u candy and he makes a weirded out face and shooes me away. Should I uh be concerned?