Alcohol use has been linked to increased conflict in relationships. According to a study published in the National Center for Biotechnology Information, alcohol use has been associated with increased verbal and physical aggression, which can lead to conflict in relationships [2]. Alcohol use can also impair judgment and decision-making, which can lead to risky behavior and poor communication in relationships [2].

Furthermore, alcohol use has been linked to suicidal behavior, which can also affect relationships. According to the Centers for Disease Control and Prevention, alcohol use is a contributing factor in approximately 30% of suicides [3]. Suicidal behavior can cause emotional distress and conflict in relationships, especially if the person struggling with suicidal thoughts is in a close relationship with someone [3].

It is important to note that alcohol use can affect each individual differently, and not everyone who drinks will experience conflict in their relationships. However, it is important to be aware of the potential risks associated with alcohol use and to seek help if alcohol use is causing conflict in relationships or contributing to suicidal behavior [2][3].

Sources:
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8104924/
[3] https://www.cdc.gov/suicide/factors/index.html