Elena spends a lot of time texting monique about her upcoming wedding. when monique forgave her husband for bad behavior, elena felt despair and anger with monique for giving in. these feelings exemplify

I believe the answer is: the paradox of close relationships

the paradox of close relationships cause a certain people to be overly dependent on other people's that they consider as 'close' in handling various situations in their live. One negative aspect of this paradox is that it might make people held their close friends accountable even for the mistake that they personally made.