Although this statement might feel true to most, it is more of an opinion rather then a fact that can be proven by supporting evidence. Of course people can find happiness in a relationship, but also some people are happier being on their own and not with someone. The claim itself is lacking a lot of supporting and substantial evidence. The claim of stressing or worrying about others might be true at times, but someone can have these same feelings for someone not being in a relationship. The article also never shows any numbers proving people are happier in relationships. All together, this claim might be a fact for one person but could be false to the next person.