I just started a new job and my boss is ……what should I do….

I just started a new job, anyway…during the interview he was smirking/smiling like crazy, well now that I got the job, he stares at me blankly in my face, or the day I started he came around my desk area and start hollering asking why am I still working and I’m like why are you yelling, and we have 10mins to go, he smirks and says well you can leave ….and waits for me to pack up and walked me 2 the elevator….the other day, we were around a few coworkers and he didn’t speak at all to me but he spoke to them….he didn’t speak to me until the end of the day….., sometimes he’ll come by my desk and stare at me or just smirk or smile at me and walk away, but doesn’t speak….most friends and fam call me Dani, but at work its Danica as i put on the job application…well he took it upon himself to call me Dani and say you can leave now, just staring at me blankly, stating you’ll get paid for the whole day….he hasn’t given me any work to do, but other employees have, there are plenty young women at the office he can pick on and who have been there for a while vrs my few weeks…wth is up with this dude? I’m 38 and he is 50