BF's friend randomly touched my hair...

Alex • 25, ABD&OB/GYN RDMS
I went bowling with my BF and some friends for my BFs bday. My BF was walking ahead of me carrying bowling balls to the lane and I was following him and I feel someone grab my hair and feel it all the way to the bottom of the strand he grabbed... I turned around and saw my BFs friend... I looked at him funny but didn't wanna start anything on my BFs bday so I just didn't say anything but what the hell was thay for....? The guy has a gf but she wasn't there that night. Came across creepy