Should I contact my ex girlfriend's best friend to know more about how she and her new boyfriend aredoing?

Anonymous
We broke up due to a misunderstandings and poor communication. She got a new boyfriend. Because she thought I broke up with her. I feel her boyfriend is just a rebound. Always want a chance to get her back, I am thinking asking her best friend for updates but she could tell my ex that I have contacted her, will this be ok? Thanks.
Updates
+1 y
We have no mutual friend she this best friend of her is the only key that I can get updates in things. If I have improved myself or she didn't get along with him. Only she can tell
Should I contact my ex girlfriend's best friend to know more about how she and her new boyfriend aredoing?
3 Opinion