If you’re in a long-term relationship, the unfortunate reality is that you’ll likely have had at least one disagreement with your partner at one point or another. However, a new study, conducted by researchers at Binghamton University in New York, says that such interactions can lead to the release of an unwanted chemical in the human body. Having an unsupportive partner can increase your stress levelsPublished in the Journal of Social and Personal Relationships, the study examined a sample of 191 heterosexual married couples to investigate whether different ways of communicating with their pa…