OKK, So what are girls suppose to do when...?

Ok so i was standing in the hallway waiting for my friend and this guy that I kinda like brushed against me. There was plenty of space behind me so it was on purpose. When i turned around i saw him (he was the only one there) and he was walking away and didn't say sorry or anything. The brush wasn't gentle or too harsh that it would of knocked me down. Like I now that's a signal but i don't know what a guy wants a girl to do.? Do i need to talk to him.? Like what do guys want girls do do.?