My boyfriend teases my friend and it's annoying me... Help?

Anonymous
I have been dating this guy for a month now... me and my friend met him at the same time (He works in the same building as we do) and he pursued a relationship with me. Anyways, we usually all see each other every day and it annoys me that he constantly teases her, about silly things (Like playfully teases her) I mean I have only ever teased guys I liked.. It wasn't too bad in the beginning but now it is really starting to bug me. He also posts funny pics on FB and will @ her on them and like he messages her occasionally (I only know cos she tells/ shows me, I don't have FB) Am I being jealous/ insecure? Or is my annoyance with the whole thing justified?
My boyfriend teases my friend and it's annoying me... Help?
4 Opinion