being friendly or flirting?

Ok so I work in a school and my co worker is a male who always seems to say stuff to me.. Like one time he told me I was showing to much skin so I got sent home which wasn't true  lol then he tells me we had a little kids dance and he was like first slow dance is me and you then he commented again on my shirt he seems to be always commenting or noticing what I'm wearing .so do u think his just being funny or flirting...I personally think his just being funny I'm just wondering what kinda vibe u are all getting from what I'v mentioned?