maybe
Well if you really want to do something about it you really only have to choices: 1:confront the girl 2:confront the guy also know that what you may some girls consider as flirting is really guys just trying to boost their ego in a way like=okay i have a girlfriend but that doesnt mean i cant still be the guy i used to be. my opinion anyways :)
you could try acting natural and not flirt with him.
Heck yes! He is flirting with another girl and he is dating you? Dump his sorry butt.
What happens is, you confront him, & if he cheating then you'll know what to do.
Respect yourself, your boyfriend, & your relationship. Be stern & up front. Tell him you have a boyfriend & that you do not appreciate his flirting. Tell him to STOP & you have to be serious about it.
either give him another chance .. or dump him (:
just tell your boyfriend that you weren't flirting with another boy because you don't want anyone besides him and if he doesn't believe you then he's not worth your time but that's if you were never flirting with another boy if you were then you seem like you would have more fun single cuz you can flirt with guys and not have your heart broken at the same time..good luck!
Flirting with her all the time, spending a lot of time with her, and giving her flirty compliments.
Either he is jealous, or has a reason to be. Have you been flirting with other guys, if yes, there is your answer.
Pay attention to who he gets more enthusiastic about. You, or your freind. He may not even be flirting with her, mabye you still have a chance. Or, mabye he doesn't like you anymore and you should look for another boyfriend.
If I was the girlfriend, and I know what's going on, I will talk to this girl and ask her what she is trying to do. I will ask her if she knows that the boy she is trying to flirt has a girlfriend. I will be civilize and calm and be professional about talking to the other girl. I will also tell her how will she feel if it was her boyfriend that's being flirt by another girl. Then I will ask nicely to stop flirting with my boyfriend.
Dont get angry. Get even. First, make sure that he actually is flirting with another girl, and then start flirting with another boy and make sure that it gets back to him. If he confronts you about it then say, "Oh sorry, I thought that was OK considering that was exactly what you were doing with (other girls name) " He will have no choice than to explain everything to you. Simples.