We are social creates. We need community to thrive. Intimate relationships improve cardiovascular function and immunity and protect blood pressure from rising. Social connection has been tied to a release of oxytocin, a hormone that reduces anxiety and improves focus and concentration. It’s all good stuff. But even better is getting a best friend. According to a study published in the journal Developmental Psychology, children who have a best friend during a negative experience show stronger levels of self-worth and lower levels of cortisol, the stress hormone. So if you are going to text in class or at work, you should text your best friend.