Girls flirt with my boyfriend in front of me. What am I doing wrong?

You should never start a fight. NEVER. Apparently you boyfriend only has eyes for you, which is good. However, maybe these women are trying to get a rise out of you. Are you secure in your relationship and do you have a reason to suspect that he is cheating on you. If not, then you are good. This is a dog eat, dog world and the woman who has the man has to work that much harder to keep him. As long as he know whose home waiting for him when he get there or who will arrive at the same time as him you should have no concerns. BUT DON"T LET DOWN YOU GUARD AROUND OTHER WOMEN! Most well get the hint others will do everything in their power to take him from you. Also, talk to some people you know who are dating- rather its a guy or a girl- see what they say too.