Most Helpful Guy
Is he really worth hurting your frienship with your friend. I would get her permission first, otherwise its a no-go.
Most Helpful Girl
its bad to go for friends' exes... your friend will probably act like she doesn't care, but believe me it leaves a dent in your friendship...
i once went for a friend's ex crush and she hated me for it even tho she acted as if she didn't care