You should tell her, they should be ok with it because they are not in love with their cousin and plus if she is really your best friend it will be cool with her.
Look at it the other way around. If he was with you but flirting with your friend. You should probably tell your friend.
If she is really your best friend she will continue to be your best friend, no matter who you are dating.
talk to you best friend . tell her how you feel. tell her that it hurts you and you feel betrayed.
Well you should tell your best friend u like him/her and well if she really likes him dont worry bout it relationships dont last very long so youll get ur chance.
Just say it. It is your cousin, not your lover. It is his best friend, not his pole smoker...
You have to tell them
Just tell your best friend, then go for it!!! good luck. =) (this is added) I liked my best friend's cousin and I told her and she was excited and totally fine with it
Ask her. If she is really your best friend she would have told you and if she is your friend she'll tell you when you ask her.
Well, tell only your best friends and make them swear not to tell anyone. Then, if you're still dating for a while, go ahead and tell a couple more people at a time.
just tell ur best-friend that u like there cousin and see what they say if its ok then try to get with him
you should try asking your boyfriend to talk to him
No my best friend is Chris Evans cousin she would tell me if she was related to him too
just tell him and get over it you should feel happy for her she is your best friend
you just do it. mmk.
You tell your friend about your feelings. don't tell them to brake up though!
it depends if he tells you that he likes your friend first but if he dating your best friend just tell him no if he ask you out