You can't tell your partner what to do.
Addy is not comfortable with her partner hanging out with a female friend of his.
Addy wants to make sure nothing is going on with her partner and the girl.
Addy sits down and talks with her partner about how she feels.
Addy gives her partner an ultimatum not to spend time with the friend.
Addy's partner is more receptive and tries to conform to make her comfortable.
Addy's partner grows apart from her due to how she is behaving.