Why is this a problem for you? Is your cousin a bad person? Is your friend a bad person? If the problem isn't a safety issue then you should wish your cousin and best friend a long and happy relationship. You may want to ask yourself if you're just jealous of the relationship they share.
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.
Just say it. It is your cousin, not your lover. It is his best friend, not his pole smoker...
Josh
My Best Cousin/friend.
yes
You have to tell them
Achilles cousin and best friend was Patroklos.
dating a best friend works every time
Such a person is your best friend.
Naya Nuki was Sacagawea's cousin
Well If you're dating your cousin I think it'll be best that nobody finds out, if you really like your cousin then keep it on the low.
You should go up to your best friend and talk to her and then is they approve go talk to their cousin I like my cousins best friend and ive talked to him.