Long Story Happened Friends B Explain I Hey

""I know you want to know what happened but it's a long story."
""It's a long story about what happened between us."
""We used to be friends but it's a long story."

A. ""Hey there's Tim. Didn't you guys used to be good friends?"
B. ""Yes, we were friends a few years ago but not anymore."
A. ""Why, what happened?"
B. ""It's a long story."

Other Common Sentences

""It's hard to explain."
""It will take a while to explain."