Actually, nothing. As long as your ex-husband doesn't have a problem with it.
dating a best friend works every time
if they are your best friend they should understand
shes really not a best friend if shes going out with her best friend's crush new person! i object wat if she was dating him first then the other best friend got the crush!?
She's not your best friend. Find a new friend.
Your best friend might be dating a jerk because they dont like you anymore, try asking your friend to spend more time with you
Yeah i would say so if ur dating your "girlfriends" best friend that's not good.
he is dating no one
Then don't be his friend anymore.
You date her best friend
Talk to your friend, if they truly are your friend the two of you will figure it out
support them both
stop dating them!