Boo was Fleabag's best friend who we learn recently died of an accidental suicide. After her boyfriend had slept with another woman, Boo wanted to get his attention and sympathy. ... She does not need to, because in these memories, Boo is that person that Fleabag can be herself with.

Why did Fleabags friend kill herself?

This is where season two finds itself, picking up after the big reveal (and sucker punch) of the first season: that the grief haunting Fleabag over the death of her best friend was also guilt: Boo committed suicide because Fleabag slept with her boyfriend.

Who dies Fleabag?

Flashbacks reveal Fleabag opened the cafe with her best friend, Boo (Jenny Rainsford), who recently died after walking into traffic.