He went out tonight, he had no idea what to do at home again. Being lonely it's sometimes just too difficult to bare, especially when you know some of your collegues are having fun, you feel like there's something wrong with your life, sometimes even if you feel the need to rest or to stay all alone in your flat, they somehow make you feel bad or even guilty about this.
They'll tell you you don't know how to live your life, that you don't even have a life, that it's always your fault, because it's always your fault since you have nothing else to do than going out and meeting people and so on...