Hell no!
No freakin way! that's what the ex is for isn't it?!
you should move on
A girl should never fight with her ex-boyfriend's new girlfriend. The girl should move on and let her ex and his new partner do the same since fighting will not solve anything.
'Ex' means the relationship is over and your boyfriend should move on from his ex and his attention should be on you. Good communication skills are a must in any relationship so it would be wise for you to discuss with this problem with your boyfriend and tell him to choose between you and his ex. Don't buy 'the friendship' excuse. Moving on from an ex is always healthier.
Questions you should ask is why does he want to harm your ex.
You can't. Since he is your "ex", you and he broke off all relationships apparently, and he has decided to move on ... so should you ... Next!!
You don't. She has a boyfriend. Move on.
Your boyfriend should be the guide to show you how to "deal" with it. You should be polite and courteous. If there are jealous feelings or you feel you cannot deal with it , you know it is time to move on.
Time.don't be jealous move on!you should try to move on and find the one that's right for you.
You can't he's your ex. Get over him and move on.
I think you should talk to your boyfriend and tell him to have a little chat with his ex.
Pray and move on...
A boyfriend that you had but you broke up with!