Contrary to what many people claim, Facebook cannot improve our experience of friendship. It may make it easier to increase our number of contacts, but there is a limit to the number of people we can keep in mind and with whom we can have a meaningful relationship. The number is 150 and is set by the size of our brains. Moreover, the quality of relationships depends on the amount of time we invest in them. If we increase our number of friends, the time devoted to maintaining each relationship will decrease and our emotional connection with each person will decline. Meaningful relationships are about being able to engage in activities with others face-to-face. Communication via the internet is no substitute.